Question

how many numbers lie between 700 and 900 leaving a remainder 4 when divided by 9 ,15 and 18 .​

Answer 1

Answer:

digit which are divided by 9 to give 4 as remainder are

706,715,724.........895

895=706+(n-1)9=>n=22

Similarly for 15

709,724,739....889

889=709+(n-1)15=>n=13

And for 18 all numbers are already included as in case of 9

Total are 13+22=45

But there may be common term which I give you as a task to do.you can also just write no and remove from total but there is mathematical way to do.