Whatsapp Mathematical Puzzle: If 5+3+2=151022, 7+2+5=?

I came across this tough maths puzzle on Whatsapp today.


Only 1% Students solved it (IAS exam)

5 + 3 + 2 = 151022
9 + 2 + 4 = 183652
8 + 6 + 3 = 482466
5 + 4 + 5 = 202541
then,
7 + 2 + 5 = ??????

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Answer to the Maths Puzzle:

The solution to the first 4 digits is pretty straight forward, and I am sure most of you must have easily got it.

It works out to be a+b+c = (a*b)(a*c)??

The last 2 digits are really tough to crack…


Here\’s how you do it.

The last 2 digit is equal to (a*b)+(a*c)-b

If we test this formula for the first equation i.e. 5 + 3 + 2 = 151022

(axb) = (5×3) = 15;
(axc) = (5*2) = 10;
(a*b)+(a*c)-b = (5×3)+(5×2)-3 = 15 + 10 -3 = 22

Similarly this equation will fit all other equations in the sequence.

To find 7 + 2 + 5 = ??????

We use the same formula;
(axb) = (7×2) = 14;
(axc) = (7*5) = 35;
(a*b)+(a*c)-b = (7×2)+(7×5)-2 = 14 + 35 – 2 = 47

Hence 7 + 2 + 5 = 143547

3 Replies to “Whatsapp Mathematical Puzzle: If 5+3+2=151022, 7+2+5=?”

  1. Very funny but your answer is wrong for maths puzzle….
    To find 7 + 2 + 5 = ??????

    We use the same formula;
    (axb) = (7×2) = 14;
    (axc) = (7*5) = 35;
    (a*b)+(a*c)-b = (7×2)+(7×5)-2 = 14 + 35 – 2 = 46

    Hence 7 + 2 + 5 = 143546

    The answer is not 143546
    But 143547

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