Question 41

Look at this series: 664, 332, 340, 170, …, 89.

What number should fill the blank?

Solution

In the given series,

$$\frac{664}{2}=332$$

$$332+8=340$$

$$\frac{340}{2}=170$$

$$170+8=178$$

$$\frac{178}{2}=89$$

The numbers in the series are divided by 2 and added with 8 alternately as shown above.

$$\therefore\ $$The required number in the series = 178

Hence, the correct answer is Option D

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