In the following question, select the missing number from the given series.
42, 21, 21, ?, 63, 157.5
- A30.75
- B32.5
- C31.5
- D33.75
Solution & Step-by-step Explanation
Let us determine the pattern of multiplication between consecutive terms of the series:
42×0.5=21
21×1.0=21
21×1.5=31.5
31.5×2.0=63
63×2.5=157.5
The series progresses by multiplying each subsequent term by an increment of 0.5. Therefore, the missing term is 31.5.
42×0.5=21
21×1.0=21
21×1.5=31.5
31.5×2.0=63
63×2.5=157.5
The series progresses by multiplying each subsequent term by an increment of 0.5. Therefore, the missing term is 31.5.