How-many-0s-at-the-end-of-1000-What-is-the-first-non-zero-digits-from-the-right-

Question Number 2387 by prakash jain last updated on 18/Nov/15

How many 0 s at the end of 1000! ?

What is the first non zero digits from the right ?

Commented by prakash jain last updated on 18/Nov/15

Number of zero can be computed using

\frac{1000}{5} + \frac{1000}{25} + \frac{1000}{125} + \frac{1000}{625} = 249

What is the appropriate method for computing

the first non zero digit ?

Commented by Yozzi last updated on 18/Nov/15

W h a t i s^{'} 1000! ?^{'} ? I s i t^{'} 1000! ?^{'} ?

Commented by prakash jain last updated on 19/Nov/15

1000 f a c t o r i a l .

Commented by RasheedAhmad last updated on 19/Nov/15

A c c o r d i n g t o c a l c u l a t i o n o f

M r p r a k a s h j a i n t h e r e a r e 249

z e r o s o n t h e r i g h t o f 1000!

T h e n w h a t a b o u t 250^{t h} d i g i t

W i l l t h i s n o t b e n o n z e r o [?]

I f I a m r i g h t t h e n

F i r s t d e t e r m i n e n u m b e r o f

z e r o s, i f t h i s i s k t h e n {(k + 1)}^{t h}

d i g i t i s n o n z e r o f r o m r i g h t .