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Find the smallest number by which -6125 should be multiplied to make it a, perfect cube.I need a full explanation for this question |
Answer» To find :-SOLUTION :-first , we will find its prime factorisation. 5 | 6125 5 | 1225 5 | 245 7 | 49 7 | 7 ⠀| 1 Here, the prime factors are :- 5 × 5 × 5 × 7 × 7 If we multiply 5 to 5 × 5 × 5 × 7 × 7 we will GET two pairs of all the DIGITS. _____ ⠀ _____ ⠀ _____ ⠀ _____ ⠀ _____ 5 × 5 × 5 × 5 × 7 × 7 [ two pairs :- 5 × 5 × 7 = 175 ] 5 × 5 × 5 × 5 × 7 × 7 = 6125 × 5 = 30,625 Hence, 30,625 is the perfect square of 175. |
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