@Arshad I was getting ans as 56
Plz post the soln
see the smallest three digit number having x<y<z is 123
so 123 onwards
from 123 to 200 there are
7+6+5+4+3+2+1=28 digits having x<y<z
from 200 to 300
6+5+4+3+2+1=21
ans so on
5+4+3+2+1=15 and
4+3+2+1=10
and
3+2+1=6
2+1=3
+1
add all these and u get 84
Easy one but doubt in ANS given
No of 3 digit no.s xyz such that (x<y<z)
(A) 84
(B) 56
three S-O double bonds.............tried to make appropriate diagram..............bt srry.............
I got the structure of h2s205
http://targetiit.com/iit-jee-forum/posts/chemical-structure-4821.html
ans 1 i dont remember exactly , but i have seen this some where .......
it has S-0-S bond , not S-S bond , but dont trust my ans i m not dat sure