2022 · Q20
What is the smallest natural number from the following which must be subtracted from 9410 to make the remaining number a perfect square?
Elementary MathematicsNumber System
- A4
- B3
- C2
- D1
Explanation
Since 97² = 9409 ≤ 9410 < 98², subtracting 1 leaves the perfect square 9409. Hence the keyed option is D.