Question

6. Find the least square number which is exactly
divisible by 4. 5. 6. 15 and 18
A700
B. 800
C600
D. 900​

Answer 1

Answer:

D. 900

Step-by-step explanation:

LCM of 4,5,6,15,and18

4=2×2

5=5×1

6=2×3

15=3×5

18=2×3×3

So, L.C.M=2

2

×3

2

×5=180

180 when multiplied by 5 becomes a perfect square.

∴ Required number=180×5=900

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