Problem 1. I'm thinking of a number.

I'm thinking of a number. I multiply it by 10 and I get the result 80. What is the number I thought about?

Fill in here

Exemple !

I'm thinking of a number. I multiply it by 4 and I get the result 36. What is the number I thought about?

I note with 'a' the number I think about.

Then 'a' multiplied by 4 is 36.

a x 4 = 36

The inverse operation of multiplication is division.

a = 36 / 4

a = 9

I thought to number 9.

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