7th Class Mental Ability Letters Question Bank Using letters for numbers

Directions: With this type of questions you are given a number equation (number sentence) with a number missing. Both sides of the equation need to have the same value. You are required to find the missing number that will balance the equation.

\[7\text{ }\times \text{ }4\text{ }+\text{ }2\text{ }=\text{ }5\text{ }\times \text{ }[?]\,\,\,-\,\,5\]

A) 7

B) 9

C) 11

D)        5

Correct Answer: A

Solution :

\[7\times 4+2=5\times -5\] Both sides total 20