Question

What should come in place of the question mark (?) in the given series? 79 72 58 37 9 ?

• A. -26
• B. -24
• C. -27
• D. -25

Answer 1

Answer:

A. -26

Let’s find the pattern step by step.

79, 72, 58, 37, 9, ?

• 79 → 72 = −7

• 72 → 58 = −14

• 58 → 37 = −21

• 37 → 9 = −28

$The differences are:<br><br>$-7,\ -14,\ -21,\ -28$
These are decreasing by 7 each time (multiples of 7).

Next difference = −35

9-35 = -26