| Direction: In each of the following number series a wrong number is given. Find out the wrong number. |
| 128 64 96 240 850 3780 20790 |
A) 128
B) 3780
C) 850
D) 20790
E) 240
Correct Answer: C
Solution :
The series is \[128\times \frac{1}{2}=64,\,\,64\times \frac{3}{2}=96,\,\,96\times \frac{5}{2}\] \[=240,\,\,240\times \frac{7}{2}=840,\,\,840\times \frac{9}{2}=3780,\,\,3780\times \frac{11}{2}\]=20790 Hence there should be 840 in place of 850.
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