Three of the following four numbers are alike in a certain way and one is different. Choose the number that does not belong to the group.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 3447
Check whether each number is a perfect cube (a whole number multiplied by itself three times).
Option (1) 24389 — \( 29^3 = 24389 \): a perfect cube.
Option (2) 12167 — \( 23^3 = 12167 \): a perfect cube.
Option (3) 4913 — \( 17^3 = 4913 \): a perfect cube.
Option (4) 3447 — \( 15^3 = 3375 \) and \( 16^3 = 4096 \), so 3447 lies between two cubes: not a perfect cube.
24389, 12167 and 4913 are perfect cubes; 3447 is not, so 3447 is the odd one out.