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.

A quarter is one fourth of a dollar - Math Riddle

121.Math Riddles

A quarter is one fourth of a dollar but Mr. Brainteaser has changed the equation as below : DOLLAR * 4 = QUARTER Can you replace each letter by a digit to make above solution correct ?


                  

    • 1830920
      Explanation :  DOLLAR * 4 = QUARTER
      457730 * 4 = 1830920

Replace the question mark with number - Math Riddle

122.Math Riddles

Which number should replace the question mark in the picture below ?


                  

  • A.26
  • B.30
  • C.25
  • D.45
A.26
    • Explanation :  26
      14 = 1^2 + 2^2 + 3^2
      21 = 4^2 + 1^2 + 2^2
      29 = 4^2 + 3^2 + 2^2
      26 = 3^2 + 4^2 + 1^2

There is a unique number - Math Riddle

123.Math Riddles

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains same digits only. Can you find that number ?


                  

    • 142857
      Explanation :  142857
      142857 * 1 = 142857
      142857 * 2 = 285714
      142857 * 3 = 428571
      142857 * 4 = 571428
      142857 * 5 = 714285
      142857 * 6 = 857142
      These number are considered as cyclic numbers.

For long they are racing ? - Math Riddle

124.Math Riddles

Before the start of the car race, Tony Stewart and Jamie Mcmurray have the same amount of fuel in the car. With this fuel Tony Stewart can drive for 4 hours while Jamie can drive five hours. After a time they realize that amount of fuel left in Tony car is 1/4th of the fuel in Jamie car. For long they are racing ?


                  

    • 15/4 hours
      Explanation :  15/4 hours
      Let us say they drive for "t" hours and initial fuel is "f"
      
      Amount of fuel used by Tony car is ft/4
      Amount of fuel used by Jamie car is ft/5
      
      As per given condition,
      f - ft/5 = 4(f-ft/4)
      Solving, t = 15/4 hours

Horse Cowboy Boot and Horseshoe Viral - Math Riddle

125.Math Riddles

Can you solve the equation by finding the value of A) Horse B) Cowboy boot C) Horseshoe


                  

    • Horse = 10, Cowboy-Boot = 1 ,HorseShoe= 2
      Explanation :  Horse = 10, Cowboy-Boot = 1 ,HorseShoe= 2
      
      = Step1 =
      3Horse = 30
      => Horse = 10 .....(A)
      
      = Step2 =
      1Horse + 2HorseShoe + 2HorseShoe = 18
      10 + 4HorseShoe =18
      HorseShoe = 2 .....(C)
      
      = Step3 =
      2HorseShoe - 2Cowboy-Boot = 2
      4 - 2Cowboy-Boot = 2
      => Cowboy-Boot = 1 ... (B)
      
      = Step4 =
      Cowboy-Boot+Horse*HorseShoe = 1+10*2 =>21 

Lena Dunham , Allison Williams, and Jemima Kirke - Math Riddle

126.Math Riddles

Lena Dunham , Allison Williams, and Jemima Kirke are 3 daughters of a good mathematician "Geroge". When I asked George the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime.? How old are the daughters ?


                  

    • 
                              
                              
      Explanation :  Lena Dunham : 2 , Allison Williams : 5 and Jemima Kirke : 7
      Age diff : 7 2 is 5 , 7 5 is 2 
      and 5 2 is 3 which all are prime numbers

Equation Math Puzzle

127.Math Riddles

1000 + 40 + 1000 + 30 + 1000 + 20 + 1000 + 10 = ?


                  

  • A.5000
  • B.4100
  • C.3500
  • D.6000
B.4100
    • Explanation :  4100.
      1000 + 40 = 1040
      1040 + 1000 = 2040
      2040 + 30 = 2070
      2070 + 1000 = 3070
      3070 + 20 = 3090
      3090 + 1000 = 4090
      4090 + 10 = 4100