Question

What should come in place of '?' in the given series? 16, 8.5, 9.5, 15.75, 33.5, ?

• A. 69
• B. 83.75
• C. 67
• D. 86.25

Answer 1

Answer:

D. 86.25

Look at the pattern:

Series:
16, 8.5, 9.5, 15.75, 33.5, ?

Observe the pattern:

Each step:
Multiply by increasing 0.5 and add increasing 0.5

• $(16 \times 0.5 + 0.5 = 8.5)$

• $(8.5 \times 1 + 1 = 9.5)$

• $(9.5 \times 1.5 + 1.5 = 15.75)$

• $(15.75 \times 2 + 2 = 33.5)$

  Next step:

$33.5 \times 2.5 + 2.5$
$= 83.75 + 2.5 = 86.25

Final Answer: 86.25