Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?
(1) 4-27
(2) 6-125
(3) 7-216
(4) 5-63
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 4.
(1) 4-27 → (4 - 1)3 = 27
(2) 6-125 → (6 - 1)3 = 125
(3) 7-216 → (7 - 1)3 = 216
(4) 5-63 → (5 - 1)3 = 64 ≠ 63