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.

Count the triangles - Math Riddle
91.Math Riddles
How many triangles can you count in this shape?
triangle_Photo_Math_Riddle_93-math-riddles
  • A.7
  • B.8
  • C.9
  • D.10
C.9 
Explanation :  

Count the triangle carefully without leaving any triangle inside

Number Math Riddle with answer
92.Math Riddles
Can you solve this number ?
Number_Riddle_94-math-riddles
  • A.1
  • B.4
  • C.3
  • D.6
B.4 
Explanation :  

there are four intersecting points.

Complete the sequence - Math Riddle
94.Math Riddles
1=3, 2=3, 3=5, 4=4, 5=4, 6=3, 7=5, 8=5, 9=4, 10=3, 11=? 12=? Can you complete the sequence?
6
Explanation :  

6. The numbers present represents the number of letters in the spelling of its corresponding number.

500 eggs in 500 minutes - Math Riddle
95.Math Riddles
Two hens can lay two eggs in two minutes. If this is the maximum speed possible, what is the total number of hen needed to get 500 eggs in 500 minutes?
  • A.2
  • B.5
  • C.4
  • D.10
A.2 
Explanation :  

Time is measured in minutes or seconds. Time is irreversible in nature as the prsent add to the future events.

Given:

Two hens can lay two eggs in two minutes.

Find:

The total number of hen needed to get  eggs in  minutes.

Solution:

According to the problem,

 eggs are layed in  minutes by  hens

 egg is layed in  minutes by  hens

 egg is layed in  minute by 

 egg is layed in  minutes by 

Thus,  egg is layed in  minutes by  hens

Hence,  hens are needed to get  egg in  minutes.

Peter was asked how old he was - Math Riddle
96.Math Riddles
Peter was asked how old he was. His reply was like this; In a period of 2 years my age will be twice my age when you asked this five years ago. How old is he?
  • A.10
  • B.9
  • C.14
  • D.12
D.12 
Explanation :  

Let Peter's age be X Years
X+2=2(X 5)
X+2=2X 10
X=12

100 coins fell down - Math Riddle
97.Math Riddles
100 coins fell down and got scattered inside a dark place. 90 of the coins fell with heads facing up and the rest 10 coins fell with tails up. You are asked to sort out these coins into 2 piles. However, each pile should have the same count of tails up coins. How is it possible?
Firstly, all the piles need not be of same size. I can make 2 piles, one with 90 coins and the other with 10 coins. Now just flip all the 10 coins on the pile. So the piles will have the same count of tails.

21 is added to four times - Math Riddle
98.Math Riddles
If 21 is added to four times a number, the result is 57.
Then_the_number_is-math-riddles
  • A.9
  • B.36
  • C.7
  • D.4
A.9 
Explanation :  

4x + 21 = 57
4x = 36
x = 9

Solve the equation - Math Riddle

99.Math Riddles
Can you solve the below equation?

30/6*2-3*2+12/2=?
  • A.8
  • B.6
  • C.10
  • D.5
C.10 
Explanation :  

Follow BODMAS Rule
So, 5*2   6 + 6 =10

Which number replace - Math Riddle
100.Math Riddles
Which number replaces the question mark?

30 6 2 3 2 12 2 ?
  • A.40
  • B.50
  • C.60
  • D.30
D.30 
Explanation :  

As you can see the lower number rows are always bigger than upper row ones with the difference going up by 3 with every step
34 - 32 = 2
32 - 27 = 5 (difference going up by 3 from last difference)
56 - 48 = 8 (difference going up by 3 from last difference)
? - 19 = 11 (difference going up by 3 from last difference)
So ? = 30

Quickfire equation? - Math Riddle
101.Math Riddles
Can you solve the below quickfire equation?
Quick_fire_equation-math-riddles
  • A.+1
  • B.-1
  • C.2
  • D.3
A.+1 
Explanation :  

Ans  :  +  1
5x^2 = ?25
5x^2 = 5
X^2 = 5/5
X=?1 = +  1

Smiley equation - Math Riddle
102.Math Riddles
Can you solve the below smiley equation?
Smiley_equation-math-riddles
  • A.200
  • B.150
  • C.180
  • D.300
C.180 
Explanation :  

180
30+30+30=90
10+30+10 =50
10+ 15+15=40
30+10*15= 180

Viral equation - Math Riddle
104.Math Riddles
Can you solve the below viral equation?
  • A.24
  • B.30
  • C.45
  • D.50
A.24 
Explanation :  

24
8 + 8 / 2(1+3)= ?
8 + 8 / 2(4)= ?
8 + 4(4)= ?
8 + 16 = ?
24

Number puzzle - Math Riddle
105.Math Riddles
2  2 = 00
3  3 = 03
4  4 = 08
5  5 = 15
6  6 = 24
7  7 = ?? 
35
Explanation :  

The value of RHS is
(A*A)   (A+A)
i.e(2*2)   (2+2) = 4   4 = 00
(3*3)   (3+3) = 9   6 = 03
(4*4)   (4+4) = 16   8 = 08
(5*5)   (5+5) = 25   10 = 15
(6*6)   (6+6) = 36   12 = 24
(7*7)   (7+7) = 49   14 = 35