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?


                  

  • A.7
  • B.8
  • C.9
  • D.10
C.9
    • Explanation :  Count the triangle carefully without leaving any triangle inside

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 :  Two hens because 2 minute 2 egg
      1 minute 1 egg
      500 minute 500 eggs

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.

Solve the equation - Math Riddle

99.Math Riddles

Can you solve the below equation?

Then the number is?


                  

  • A.8
  • B.6
  • C.10
  • D.5
C.10
    • Explanation :  10
      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?


                  

  • 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?


                  

  • 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 = ??

8 8 2(1+3)= ?


                  

    • 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