Algebra

Quantitative Aptitude (RRB NTPC)

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The greatest among the numbers 3√2, 3√7, 6√5, 2√20 is

3√2

3√7

6√5

2√20

Explanation:

3√2 = 3 × 1.4 = 4.2
3√7 = 3 × 2.6 = 7.8
6√5 = 6 × 2.2 = 13.2
2√20 = 2 × 4.5 = 9
Hence, the greatest number is 6.
Hence, the greatest number is 6√5.

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