1.

Find the greatest 6-digit number which is exactly divisible 625

Answer»

Step-by-step explanation:

Take the last number with 6 digits: 999999

Now check if it is DIVISIBLE by 625:

999999:625=1599,9984

It isn’t divisible but now you know that the nearest MULTIPLE is 1599 so:

1599×625=999375

This is the biggest.

Try to add 625 again:

999375+625=1000000

The next multiple has more than 6 digits so 999375 is the biggest.

In general, the greatest X-digit number that is divisible by Y is the integer part of

(10X−1):Y

Try again:

(106–1):625=999999:625=999375k

I its not CLEAR see IMAGE.



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