self Maths Puzzle

1/1=1
2/2=1
3/3=1
y/y=1
z/z=1
But..
0/0=0 not 1

Read Solution (Total 1)

self Other Question

How many numbers between 200 and 1200 can be formed with digits 0,1,2,3(repetition of digits not allowed)?

OPTIONS-
a)6
b)8
c)2
d)14
(1/1*2)+(1/2*3)+(1/3*4)+(1/4*5)+ .............+(1/99*100)=