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### Hard Math Riddles

Top 5 Hard Math Riddles

Hard Math Riddles 1 : Hard Math Riddle
Difficulty ★★★★☆     Popularity ★★★★★

Take 9 from 6, 10 from 9, 50 from 40 and leave 6.

How Come ??

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Hard Math Riddles 2 : Hardest Math Riddle
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Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

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Hard Math Riddles 3 : Mathematical Riddle
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Using only two 2's and any combination of mathematical signs, symbols and functions can you make 5?

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Hard Math Riddles 4 : February Series Question
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Find The Next Number
12 13 15 17 111 113 117 119 123 ?

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Hard Math Riddles 5 : Hard Maths Riddle
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Using the digits 1 up to 9, two numbers must be made. The product of these two numbers should be as large as possible. All digits must be used exactly once. Which are the requested two numbers. ?

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Last Updated:2012-02-04

#### 24 comments:

1. 2 squared = 4
2 divided by 2 = 1
4 + 1 = 5!

1. now that's just sad....
you have used 4 twos...
ur supposed to use 2 twos
the answer is sqr root ((0.2)^(-2))

2. 2+2+n^(n-n) = 5 ..

-rodolf

3. The answer is √(.2^−2)

4. sqr root ((0.2)^(-2))
i think this is a bullshit answer... u used 0 too to turn 2 into 0.2 ...

5. (∞√2)+(2^2)=5

and no to "the x power" is a mathematical expression not a number on itself

6. (∞√2)+(2^2)=5

and no to "the x power" is a mathematical expression not a number on itself

2. 2^2+2^0=5

3. You are all right

1. i cant answer so hard questions as im in class V

2. Try Easy One :-)

4. 129 is the ans...

5. Thhhhhhppppp i dont like math its toooooo hard and confusing;p

6. 2 + 2 + sinx^2 + cosx^2 = 5

7. These are easy

8. I thought 9-6=3, 10-9=1, and 50-40=10. so, 3+1=4 and 10-4=6

1. You are right and a genius!!!

2. I have to admit too:)

9. 2 divided by 2 + 2 x 2

10. I need a tough math riddle/ logic puzzle 4 skool. DO U KNOW WHERE 2 FIND 1??????

11. for simplicity, let s(x) = square root of x.
then s(s(s(s(s(2))))) = 2^(-5), so :
-log(s(s(s(s(s(2))))))/log(2) = 5