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15. No, 2352 is not a perfect square
Prime factorisation of 2352 is
2×2×2×2×3×7×7
IN THIS FACTORISATION ALL FACTORS ARE IN PAIRS EXCEPT 3
THEREFORE, 2352 Must be multiplied by 3 to make it a perfect square
that is 2352×3
= 7056
square root of 7056 is 84
16. five rational numbers between 2/5 &1/4 are .....
LCM of 5 and 4 is 20
2/5= 2/5×40/40 = 80/200
1/4 =1/4×50/50 = 50/200
five rational numbers are 60/200, 61/200, 62/200, 63/200, 64/200.........
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the smallest number by which 2352 be multiplied is 3. it will become a perfect square of 84(2352×3=7056)
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