Question

find the missing number 3 4 12 7 32, 1 5 11 8 56, 2 9 6 3 x ...

Answer 1

You will start with subtracting the numbers horizontally and will note down their difference.

The negative sign is not a problem in such cases.

For the first case we will get this:

(12 - 4) x (7 - 3) = 8 x 4 = 32. (i.e. the number at the center.)

When we talk about the second case we will get this

: (11 - 5) x (8 - 1) = 6 x 7 = 42.

And for the third problem:

(9 - 6) x (3 - 2) = 3 x 1 = 3