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BEST Method:sud21 wrote:6/( 1/ √ 12 + 1/√ 13 ) =
a)6/5
b)5/6
c)5
d)2√3 +3 √2
e)6√3−6√ 2
Although I have eliminated other options to find best suitable option but these options still look Incorrect as the answer is nowhere close to 10 while checking any optionGMATinsight wrote:BEST Method:sud21 wrote:6/( 1/ √ 12 + 1/√ 13 ) =
a)6/5
b)5/6
c)5
d)2√3 +3 √2
e)6√3−6√ 2
6/( 1/ √ 12 + 1/√ 13 ) = 6/(1/3.5 + 1/3.5) = 6/(0.3+0.3) = 6/0.6 = 10
Checking Options:
a)6/5 Close to 1.2 so nowhere close to 10 which is expected result of given expression
b)5/6 Close to 0.8 so nowhere close to 10 which is expected result of given expression
c)5 Nowhere close to 10 which is expected result of given expression
d)2√3 +3 √2 = 3.4+4.2=7.6 Closest Option
e)6√3−6√ 2 = 6(1.7-1.4) Close to 1.8 so nowhere close to 10 which is expected result of given expression
Answer: Option D
6/(1/√12 + 1/√13 ) = 6/(positive fraction) = MORE THAN 6.sud21 wrote:6/(1/√ 12 + 1/√ 13 ) =
a)6/5
b)5/6
c)5
d)2√3 + 3√2
e)6√3 − 6√2
√9 = 3 and √16 = 4sud21 wrote:6/( 1/ √ 12 + 1/√ 13 ) =
a)6/5
b)5/6
c)5
d)2√3 +3 √2
e)6√3−6√ 2
