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Aptitude · Q158

Surds And Indices

Competitive Exams · Aptitude · question 158

Q158

Which of the following statement(s) is/are true? I. (65)1/6 > (17)1/4 > (12)1/3 II. (17)1/4 > (65)1/6 > (12)1/3 III. (12)1/3 > (17)1/4 > (65)1/6

A.
Only I
B.
Only III
Answer
C.
Only II
D.
None of these

Answer: Option B

Solution

Answer: Option B
Solution:
(65)1/6
(17)1/4
(12)1/3
LCM of 4, 6, 3 = 12
∴ (652)1/12 = (4225)1/12 . . . . . . (I)
(173)1/12 = (4913)1/12 . . . . . . (II)
(124)1/12 = (20736)1/12 . . . . . . (III)
From equation (I), (II), (III) we can see that only (III) statement follows.