Question

Fill in the missing number:

$\begin{array}{ccc}12& 60& 360\\ 8& 40& 240\\ 4& 20& ?\end{array}$

• A. 240
• B. 120
• C. 720
• D. 180

Answer 1

The correct option is B

120

For the first two rows:

$60÷12=5$ and $360÷60=6$

$40÷8=5$ and $240÷40=6$

So, we observe that in a row:

Number in the second column = 5 $\times$ Number in the first column

Number in the third column = 6 $\times$ Number in the second column

So, 5 $\times$ 4 = 20 and 6 $\times$ 20 = 120

Hence, the missing number is 120.