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Find the smallest 4-digit number which is a perfect square.
A1000
B1024
C1089
D1225
Answer & Solution
Correct answer: B. 1024
The smallest 4-digit number is 1000. √1000 ≈ 31.6, so the next integer is 32. Then 32² = 1024 is the smallest 4-digit perfect square. (31² = 961 is a 3-digit number.)
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