Question

7. Find the greatest five digit number that is exactly divisible by 21 and 28.​

Answer 1

Answer:

Largest five digit number is 99999,

LCM of 7,10,15,21,28 is

7=7

10=2∗5

15=3∗5

21=3∗7

28=2∗2∗

so, 2∗2∗3∗5∗7=420

⇒

420

99999

remainder will be 39 so

99999−39=99960

So answer is C

Explanation:

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Answer 2

Answer:

hi mate

gm

the gretest five digit number is 99999

but when we divide it by 21 and 28 we got above is answer