find the greatest number of 4 digit which is divisible by 15 20 and 25
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LCM = 300
Greatest 4digit number = 9999
9999 ÷ 300 = 33 as quotient and reminder also there.
So 300 x 33 = 9900 is the greatest 4digit number.
(you can find the answer by subtracting the reminder from 9999)
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