Question 26

Select the number from among the given options that can replace the question mark (?) in the following series.

6, 24, 60, 120, 210, ?

Solution

Here the double difference is applicable which is given below.

Let's assume 'y' in place of the question mark.

So 18+6 = 24

24+6 = 30

30+6 = (y-210)-90

36 = y-300

y = 300+36

y = 336

So here '336' will come in place of the question mark.

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