Question

Find the smallest 4-digit number that is exactly divisible by 36, 40 and 45.
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Answer 1

36= 2×2×3×3

40=2×2×2×3

45=3×3×5

LCM of (36,40,45)= 360.

So smallest four digit number which is divisible by

36,40 45 is multiple of 360

i.e. 360 , 720, 1080

So Ans:-1080