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28, 15 16, 25, 51, ?...

28, 15 16, 25, 51, ?

A

124

B

128.5

C

150

D

127.5

Text Solution

Verified by Experts

The correct Answer is:
B
The pattern is `xx0.5+1, xx1+1, xx1.5xx1, xx2+1,xx2.5+1`,
`:. 51xx2.5+1=128.5`
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