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1. The lest number by which 1470 must be divided to get a number which is a perfect square is:
- A. 5
- B. 5
- C. 5
- D. 5
Answer: Option D
Explanation:
Hints : 1470 কে গ, সা, গু করলে হয়
1470 = 2× 5× 3× 7× 7
So, the least number is = 2× 5× 3 = 30
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