1.

What will come in place of question mark (?) in the following number series?10, 15, 25, 40, ?, 851. 552. 653. 504. 705. 60

Answer» Correct Answer - Option 5 : 60

Given:

The number series:

10, 15, 25, 40, ?, 85

Concept Used:

Number series following a fixed pattern.

Calculation;

The given number series follows the pattern:

10 + (5 × 1) = 15

15 + (5 × 2) = 25

25 + (5 × 3) = 40

40 + (5 × 4) = 60

60 + (5 × 5) = 85

∴ The number in place of “?” in the given number series is 60



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