| Directions: What approximate value should come in place of question mark (?) in the following questions? (You are not required to calculate the exact value.) [IBPS (PO) 2013] |
| \[{{(4.989)}^{2}}+{{(21.012)}^{3}}+\sqrt{1090}=?\] |
A) 9219
B) 9391
C) 9319
D) 9129
E) None of these
Correct Answer: C
Solution :
| \[{{(4.989)}^{2}}+{{(21.012)}^{3}}+\sqrt{1090}\] |
| \[\Rightarrow \]\[?\approx {{(5)}^{2}}+{{(21)}^{3}}+\sqrt{1089}\] |
| \[\Rightarrow \]\[?\approx 25+9261+33=9319\] |
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