Find the odd one out using the square-number pattern: for three of the…
2025
Find the odd one out using the square-number pattern: for three of the numbers, adding 5 gives a perfect square.
- A.
436
- B.
524
- C.
672
- D.
779
Attempted by 207 students.
Show answer & explanation
Correct answer: C
Correct answer: 672
Check the pattern given in the stem: add 5 and see whether the result is a perfect square.
436 + 5 = 441 = 21²
524 + 5 = 529 = 23²
779 + 5 = 784 = 28²
672 + 5 = 677, which is not a perfect square
Therefore, 672 is the odd one out under the square-number pattern. The stem now states this basis clearly so parity alone is not used as the comparison rule.