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Nagalakshmi

· started a discussion

· 1 Months ago

Numerical ability (Question: 125039.0 )

Easy explanation to understand

Question:
Direction : What should come in place of the question mark (?) in the following question?


(√8× √8)1/2 + (9)1/2 = (?)3 + √8 – 340

Options:
A) 7
B) 19
C) 18
D) 9
E) None of these
Solution:

(?)3 + √8 – 340 = (√8 × √8)1/2 + (9)1/2

⇒ (?)3 + √8 – 340 = √8 + 3

⇒ (?)3 = √8 + 3 - √8 + 340

⇒ (?)3 = 343

⇒ ? =  \(\sqrt[3]{343}\)

⇒ ? = 7

Knowledge Expert

· commented

· 1 Months ago

In step 2 you cut root 8 from LHS and RHS. This quest will become more easy.
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