Question

Find the largest 3-digit number which is exactly divisible by 20​

Answer 1

Answer:

15= 5 x 3

25=5 x 5

30= 5 x 3 x 2

Therefore lcm of 15, 25 and 30 is = 5 x 5 x 3 x 2= 150.

So 150 x 6 = 900

150 x 7 =1050

So the largest 3- digit number divisible by 15,25 and 30 is 900.

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Answer 2

The largest 3 digit number which is exactly divisible by 20 is 100.

100÷20=5