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Find the greatest 5-digit number which, when divided by 25, 30, and 40, leaves remainders of 20, 25, and 35, respectively.

Answer :

Let us find the LCM of the given numbers 25,30 ,40

Lcm= 600

The difference in numbers from the remainder are

25-20=5

30-25=5

40-35=5

The remainder in each case is 5 less than the divisor

The greatest 5 digit number divisible by 5 is 99995

Dividing this by LCM 600

[tex] \frac{99995}{600} =166.66 [/tex] =167(rounded)

Let n+5 leaves remainder 5 when divided by 25,30,40

n+5=167 times 600

n+5=99600

n=99595

The 5 digit greatest number divided by 25,30and 40 leaving a remainder of 20, 25 and 35 respectively is 99595.

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