LebGeeks

duke-of-bytes

Member

math riddle

hello awesome people
i am looking to solve this but keeps failing - the answer is 8 according to the book but i couldnt find the relation
https://imgur.com/ypvVmuY
https://imgur.com/yrRwboP

Mero55

Member

Re: math riddle

Hey!

If you do figure it out, can you share the answer?

Good luck!

MSD

Member

Re: math riddle

First off, the number on the right side in the top right square looks like a 6 but should be a 5 (which made finding an answer even harder).
In each square subtract the sum of the horizontally opposed numbers from the product of the vertically opposed numbers, you get 40.
(5x13) - (5+20) = (4x12) - (3+5) = (4x16) - (4+20) = (5x11) - (7+8)

I ended up using google after giving up ...