| Directions: What will come in place of question mark (?) in the following number series? [RBI (Clerk) 2015] |
| \[1338,\]\[447,\]\[150,\]\[51,\]\[18,?\] |
A) 7
B) 6
C) 9
D) 10
E) 11
Correct Answer: A
Solution :
| We have,\[1338\div 3+1=447\] |
| \[447\div 3+1=150\] |
| \[150\div 3+1=51\] |
| \[51\div 3+1=18\] |
| So, at the place of \[?=18\div 3+1\] |
| \[=6+1=7\] |
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