Question

The greatest number of five digit exactly divisible by 8 is​

Answer 1

Answer:

99999

Step-by-step explanation:

By investigating the prime factorizations of 8 (2x2x2), 15 (3x5), and 21 (3x7), you can determine that their Least Common Multiple is 2x2x2x3x5x7 which is 840. The greatest 5 digit number is 99999.

Answer 2

Given:

The greatest number of five digit exactly divisible by 8 is

• Start with largest 5 digit number - 99999

• We know that the last three digits is divisible by 8 then the whole number is divisible 8
• If last three numbers of 99999 is divided by 8 than leaves reminder 7

•  then subtract 7 from the largest number

        99999 – 7

        =99992

Hence 99992 is the largest 5 digit number that is divisible by 8