Quantitative Aptitude Ques 151
Question: Directions: What approximate value is come in place of question mark (?) in the given questions? (You are not expected to calculate the exact value.) [NICL (AO) 2014]
$ {{(?)}^{2}}+{{(79)}^{2}}={{(172)}^{2}}-{{(88)}^{2}}-8203 $
Options:
A) 86
B) 89
C) 83
D) 81
E) 87
Show Answer
Answer:
Correct Answer: A
Solution:
- $ {{(?)}^{2}}+{{(79)}^{2}}={{(172)}^{2}}-{{(88)}^{2}}-8203 $
$ \Rightarrow $ $ {{(?)}^{2}}+6241=29584-7744-8203 $
$ \Rightarrow $ $ {{(?)}^{2}}=29584-15947-6241 $
$ \Rightarrow $ $ {{(?)}^{2}}=7396 $
$ \Rightarrow $ $ ?=86 $
BETA
