**Question:**

The highest power of 9 dividing 99! completely is

12 ans

A molecule of hydrogen means two atoms of hydrogen then what is the difference ?

22 is __coorrect__

Just forgot ...81 has two nines so...answer becomes 23.....also when 27 is divided by 9 it produces a 3 which combines with the 3 produced by the result of 54/9 =6 =3*2 .......final answer comes to 24.

24

As 99! = 99 *98 ......2*1

So from 9 to 99 there are 11 multiples of nine.

Then also some multiple of three as 3*3=9.

Total number of multiples of 3 between 3...99 =33

As some multiples of 3 are also multiples of 9 (which we have already counted ) so, 33-11=22 ....as two 3`s are required to make a 9 so 22/2 =11.

Finally total numbers of multiples of 9 in 99! are = 11 +11 =22

1 (one)

12