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.

\[5\text{ }\times \text{ }3\text{ }+\text{ }10\text{ }=\text{ }11\text{ }+\text{ }12\text{ }+\text{ }[?]\]

A) 9

B) 2

C) 7

D)        5

Correct Answer: B

Solution :

\[5\times 3+10=11+12+\] Both sides total 25