Find the number of numbers from 1 to 100 which are not divisible by any one of 2 3 5

ans is 21

11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97
8 years agoHelpfull: Yes(11) No(3)
@ Myana avishek,u have to exclude the prime no.s 2,3,5 and 7....so ans will be 25-4=21
8 years agoHelpfull: Yes(4) No(1)
I think its 22....isn't 1 too to be added ....
so prime no:s b/w 1-100 =21
add '1' as digit 1 can't also be divided by any of the given digit
so, 21+1=22
8 years agoHelpfull: Yes(4) No(5)
11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97
ans is correct 21
8 years agoHelpfull: Yes(3) No(1)
total 22
1,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97=22
8 years agoHelpfull: Yes(2) No(2)
@ PARTH , pardon ,but the question is not to count prime no:s ..... make yourself clear with the question..'find the no; of numbers those are not completely divisible by 2 or 3 or 5 or 7 '....
8 years agoHelpfull: Yes(2) No(1)
All Prime Numbers between 1 to 100 - (4)= 25-4
Ans is :: 21
8 years agoHelpfull: Yes(1) No(0)
since the question is not between 1 t0 100. therefore u have to add 1 also.and the the answer is 22 not 21.
read the questions carefully before answering.
8 years agoHelpfull: Yes(1) No(4)
@Dheeraj 1 is not a prime nor a composite number..
8 years agoHelpfull: Yes(1) No(0)
the numbers that are not divisible by 2,3,5 and 7 are prime numbers.There are 25 such numbers from 1 to 1100.
8 years agoHelpfull: Yes(0) No(3)
why did u not consider 1 ?
8 years agoHelpfull: Yes(0) No(0)

Find the number of numbers from 1 to 100 which are not divisible by any one of 2,3,5,7.