| Directions: What approximate value will come in place of question mark (?) in the following questions? (You are not expected to calculate the exact value.) |
| \[{{(41.33)}^{2}}+{{(7.96)}^{2}}-{{(22.02)}^{2}}=?\] |
A) 1280
B) 1440
C) 1580
D) 1540
E) 1380
Correct Answer: A
Solution :
| \[{{(41.33)}^{2}}+{{(7.96)}^{2}}-{{(22.02)}^{2}}=?\] |
| \[\Rightarrow \] \[?\approx {{(41)}^{2}}+{{(8)}^{2}}-{{(22)}^{2}}\] |
| \[\Rightarrow \] \[?\approx 1681+64-484\] |
| \[\Rightarrow \] \[?\approx 1261\approx 1280\] |
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