Question

find the greatest 5 digit number which is exactly divisible by 40...​

Answer 1

The largest 5 digit number that is exactly divisible by 40 is 99,960. Think about it; the smallest 6 digit number, 100,000, is divisible by 40, two and one half thousand times. But if you subtract 40 from that, then you get 99,960( into which 40 can go, 2,499 times). Therefore, your answer is 99,960.

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Answer 2

To find the greatest 5 digit number divisible by '40'

Greatest 5 digit number is 99999

But it is not divisible by '40'

40 = 4*10

Hence the number should be both divisible by '4' and '10'. So the number has to end in '0' since it has to be divisible by 10.

99960 is the greatest 5 digit number divisible by 40.