| Directions: In these questions, a number series is given. Only one number is wrong which does not fit in the series. Find out the wrong number. [RBI (Assistant) Grade B 2015] |
| 10, 4, 3, 3.5, 6, 15, 41 |
A) 3
B) 15
C) 4
D) 6
E) 3.5
Correct Answer: B
Solution :
| \[10\times 0.5-1=4\]\[\Rightarrow \]\[4\times 1-1=3\] |
| \[3\times 1.5-1=3.5\]\[\Rightarrow \]\[3.5\times 2-1=6\] |
| \[6\times 2.5-1=[14]\]\[\Rightarrow \]\[14\times 3-1=41\] |
| \[\therefore \]Wrong number \[=15\] |
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