Can u explain not so easy math

#1

1.explain problem statement properly.
2.explain the o/p with example.

#2

Problem is that you have to find number of numbers from 1 to n which are divisible by any prime from 1 to 20. Example : if n=30 then the numbers are 2 to 20, 21, 22, 24, 25, 26, 27, 28, 30.

#3

i dont understand o/p

#4

can you send your i/p o/p so that i can explain.

#5

in the example you gave i dont understand how it works ?

Problem is that you have to find number of numbers from 1 to n which are divisible by any prime from 1 to 20. Example : if n=30 then the numbers are 2 to 20, 21, 22, 24, 25, 26, 27, 28, 30.

#6

please elaborate your doubt.

#7

if n=30 then the numbers are 2 to 20, 21, 22, 24, 25, 26, 27, 28, 30.
i dont understand this line !!!

#8

these are the numbers which is divsible by at least one prime from 1 to 20.
Note: 2 to 20 means all numbers from 2 to 20(inclusive)