question_answer

Observe the following.

\[\begin{align}   & \mathbf{1\times \_\_=30} \\  & \mathbf{2\times \_\_=30} \\  & \mathbf{3\times \_\_=30} \\  & \mathbf{5\times \_\_=30} \\ \end{align}\]

What is the sum of all the missing factors of 30?

A)  60                              

B)  30                  

C)    45                  

D)    61

Correct Answer: D

Solution :

\[\therefore \] The sum of the missing factors of 30 is 30 + 15 + 10 + 6 = 61.