100+ Challenging math riddles to keep your mind sharp

If you want to improve your mathematical skills and challenge your brain, these 100+ math riddles are for you. From basic arithmetic to advanced algebra, these math puzzles and math equations will test your problem solving abilities and help you hone your math skills. These riddles are a fun and engaging way to improve your math skills. Check your answers against the provided solutions or try to solve them all on your own. Either way, you'll be sure to have a good time while you're at it.

Bees and Flowers Logic -Math riddle
31.Math Riddles
There are some lotus flowers in a pond and some bees are hovering around. 
If one bee lands on each flower one bee will be left,
If two bees land on each flower one flower will be left,
Then the number of flowers and bees respectively are 

How many flowers and bees are there?
  • A.3,4
  • B.4,3
  • C.2,3
  • D.3,2
A.3,4 
Explanation :  

Let the number of flowers  = x
 if one bee lands on each flower Then one bee will be left So number of bees in this case =x*1+1=x+1
If two bees land on each flower then one flower will be left  so number of bees in this case 
=(x-1)*2=2x-2
we have 
x+1=2x-2
x=3
Number of flowers  =3
Number of bees =x+1=3+1=4

Magnifying Glass -Math riddle
32.Math Riddles
Jim was examining an angle measuring 14 and 1/2 degrees, using his magnifying glass that magnifies everything two times. Under the glass, how large would that angle measure?

                      
                      
Explanation :  

14 and 1/2 degrees, because magnifying glass that magnifies everything two times

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            

              
              
              
              
            

            
            
            
            
            
            
            
            
            

            

              
                
Laying Egg's -Math riddle

              
              

                

                  
33.Math Riddles

                

                

                  
If a hen and a half lay an egg and a half in a day and a half, how many eggs will half a dozen hens lay in half a dozen days?


                  

                  
                  
                  

                

                

                  
                  


                    

                      
Two dozen (24) 

                      
                      
Explanation :  

If you increase both the number of hens and the amount of time available four-fold (i.e., 1.5 times 4 equals 6), 
the number of eggs increases 16 times. 
16 * 1.5 = 24.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            
            
            
            
            
            
            
            

            

              
                
Added to the sum of their squares is 109 -Math riddle

              
              

                

                  
34.Math Riddles

                

                

                  
There are two numbers whose product added to the sum of their squares is 109, and the difference of whose squares is 24. What are the two numbers?


                  

                  
                  
                  

                

                

                  
                  


                    

                      
5 and 7. 

                      
                      
Explanation :  

(5)² = 25(7)² = 49(5*7)+25+49=10949-25=24

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            

              
              
              
              
            

            
            
            
            
            
            
            
            
            

            

              
                
Add five to twelve-Math riddle

              
              

                

                  
35.Math Riddles

                

                

                  
I add five to twelve, and get five. Why is this correct?


                  

                  
                  
                  

                

                

                  
                  


                    

                      

                      
                      
Explanation :  

When it is 12 pm, adding five hours makes it 5 pm.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            
            
            
            
            
            
            
            

            

              
                
How many kids-Math riddle

              
              

                

                  
36.Math Riddles

                

                

                  
At a children's party, 
10 kids had juice, 
8 kids had cake, 
and 6 kids had juice and cake. 
How many kids were there at the party?


                  

                  
                  
                  

                

                

                  
                  


                    

                      
12 kids

                      
                      
Explanation :  

6 kids had juice and cake, leaving 2 out of the cake eaters that didn't have juice. 
As there were 10 juicers, there must be 12 kids in total.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            

              
              
              
              
            

            
            
            
            
            
            
            
            
            

            

              
                
How many earrings are being worn in this club? - Math Riddle

              
              

                

                  
37.Math Riddles

                

                

                  
There is a certain club which is for men only. There are 600 men who belong to this club and 5% of these men wear one earring. Of the other 95% membership, half wear two earrings and the other half wear none. How many earrings are being worn in this club?


                  

                  
                  
                  

                

                

                  
                  


                    

                      
600 

                      
                      
Explanation :  

We know that 5%, or 30 of the men are wearing one earring. Of the other 95%, or 570, we know that half are wearing two earrings and the other half none. This is the same as if they all wore one.

first off, 5% of 600 is 5 * 600 / 100 = 30. 
So 95% is 570. so there are 570 + 30 = 600 earrings.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            
            
            
            
            
            
            
            

            

              
                
Bill was eight times the age of his son - Math Riddle 

              
              

                

                  
38.Math Riddles

                

                

                  
Eight years ago, Bill was eight times the age of his son Bill Jr. Today, if you add their ages together, they add up to 52. How old are Bill and his son?


                  

                  
                  
                  

                

                

                  
                  


                    

                      
Bill is 40, and Bill Jr. is 12.

                      
                      
Explanation :  

Eight years ago, Bill Jr. was x years therefore Bill was 8x

Today

(x+8) +(8x+8) = 52

x+8 + 8x+8 = 52

9x + 16 = 52

9x = 52–16

9x = 36

Therefore x = 4

Bill Jr. is

x + 8 = 12

4 + 8 = 12 years old

Bill is

8x + 8 = 32 + 8

32 + 8 = 40 years old

Therefore 12 + 40 = 52 years.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            

              
              
              
              
            

            
            
            
            
            
            
            
            
            

            

              
                
Three matches are sitting on a table -Math riddle

              
              

                

                  
39.Math Riddles

                

                

                  
Three matches are sitting on a table. Without adding another make for three matches four. You are not allowed to break any of the matches. How can this be done?


                  

                  
                  
                  

                

                

                  
                  


                    

                      

                      
                      
Explanation :  

Shape the 3 matches into a roman numeral four.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            
            
            
            
            
            
            
            

            

              
                
Nonstop Train -Math riddle

              
              

                

                  
40.Math Riddles

                

                

                  
A nonstop train leaves Moscow for Leningrad at 60 mph. Another nonstop train leaves Leningrad for Moscow at 40 mph. How far apart are the trains 1 hour before they pass each other?


                  

                  
                  
                  

                

                

                  
                  


                    

                      

                      
                      
Explanation :  

100 
Two trains speed is 60 and 40 mph. so 1 hour before they will be in a position to cover their speed.
so 60+40 = 100 miles away from each other.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            

              
              
              
              
            

            
            
            
            
            
            
            
            
            

            

              
                
Three times as old as my sister was -Math riddle

              
              

                

                  
41.Math Riddles

                

                

                  
One sister says of her younger sister: 
"Two years ago, I was three times as old as my sister was. In three years's time, I will be twice as old as my sister.? How old are they each now?


                  

                  
                  
                  

                

                

                  
                  


                    

                      

                      
                      
Explanation :  

One way to solve this math  is to use even numbers: The elder sister will be twice as old as her younger sister in three year's  time. This immediately rules out the elder sister currently being 8, 11, and 14, so she must be 17, and the younger sister 7.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            
            
            
            
            
            
            
            

            

              
                
Creature and Fill tank -Math riddle

              
              

                

                  
42.Math Riddles

                

                

                  
There is a Creature which could double its size every day. So, if the Creature is put in a tank then it will fill the tank in 10 days. How many days would it take for the creature to fill 1/2 and 1/4 of the tank?


                  

                  
                  
                  

                

                

                  
                  


                    

                      
9 days to fill 1/2 and 8 days to fill 1/4 of the tank.  

                      
                      
Explanation :  

If the creature fills the tank in 10 days and it doubles every day, on the ninth day it would fill 1/2 the tank. Thus on the 8th day it will fill 1/4 of tank.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            

              
              
              
              
            

            
            
            
            
            
            
            
            
            

            

              
                
What is the next number -Math riddle

              
              

                

                  
43.Math Riddles

                

                

                  
What is the next number in the series? 
7,645  5,764  4,576  ?


                  

                  
                  
                  

                

                

                  
                  


                    

                      
6,457

                      
                      
Explanation :  

The last digit is moved to the front to make the next number.
In this number series,
7,645 = 5,7645
similary, 
4,576 = 6,457

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            
            
            
            
            
            
            
            

            

              
                
How many brothers and sisters are there in the family? - Math Riddle

              
              

                

                  
44.Math Riddles

                

                

                  
A boy has as many sisters as brothers, but each sister has only half as many sisters as brothers. 
How many brothers and sisters are there in the family?
A boy has as many sisters as brothers, but each sister has only half as many sisters as brothers. 
How many brothers and sisters are there in the family?


                  

                  
                  
                  

                

                

                  
                  


                    

                      

                      
                      
Explanation :  

Four brothers and three sisters.

                      
                    


                  

                

                

                  
                  
                  
                

            


            
            
            

              
              
              
              
            

            
            
            
            
            
            
            
            
            

            

              
                
Two whole Positive Number-Math riddle

              
              

                

                  
45.Math Riddles

                

                

                  
What two whole, positive numbers that have a one digit answer when multiplied and a two digit answer when added?


                  

                  
                  
                  

                

                

                  
                  


                    

                      

                      
                      
Explanation :  

1 and 9.