numbers and integers

[gmat.raj]

how many integers n are there such that 1<5n+5<25?
a)5 b)4 c)3 d)2 e)1

[saravanants]

1) n=0 => 1<5<25 - OK
2) n=1 => 1<10<25 - OK
3) n=2 => 1<15<25 - OK
4) n=3 => 1<20<25 - OK
5) n=4 => 1<25<25 - NOK (anything n>=4 should not be ok)
6) n=-1 => 1 < 0 <25 - NOK (anything n < 0 should not be ok)
So option B.

[rajatmeh]

yes (B).

[abhishek_mumbai]

Agreed.. (B)

[gmat.raj]

yes b

[tryingharder]

This Q is in OG 11. Another way to solve it is
1<5n+5<25

1-5<5n<25-5
-4<5n<20

-4/5<n<4. So the integers are between -4/5 to 4. so it is 0,1,2,3. I.e b

[eravi11]

+1 for B

[xperience]

+2 for B

[gmat.raj]

thanks its b.

[touche]

1,2,3,4 satisfy so 4!