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`CBSE`

Number Series

11.

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

6, 9, 15, 24, 39, 63, ?

12.

Find the missing number in the following series:

43, 172, 86, 344, ?

13.

The sum of the ages of father and a son presently is 70 years. After 10 years, the son's age is exactly half that of the father. What are their ages now?

14.

Find the wrong number in the series.

225, 206, 188, 176, 165, 158, 153

15.

A series is given, with one term missing. Choose the correct alternative from the given one that will complete the series.

68, 72, 65, 69, 62, 66, ?

16.

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

11, 17, 25, 33, 43, ?

17.

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

41,43, 47, 53, ?

18.

In the following question, select the missing number from the given series.

1, 3, 6, 10, 15, ?

19.

In the following questions, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

3, 15, 8, 24, 15, 35, ?, 48, 35

20.

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

9, 18, 72, 576, ?