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  1. What is the smallest number by which 625 must be divided so that the quotient is a perfect cube ?
    1. 25
    2. 5
    3. 2
    4. 3
Correct Option: B


∴  625 = 5 × 5 × 5 × 5 = 53 × 5
For the smallest cube number,
625 should be divided 5,
625 ÷ 5 = 125 = 53


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