10.If 100 ! = 100 x 99 x 98 x … x 2 x 1, the maximum power
of 20 which will divide 100 ! is
1] 21 2] 22 3] 23 4] 24
Plz Explain

Answer Posted / vigneswari vennila sathesh suj

calculate the no of 5's..(highest factor of 20)
100 --> 2
95--> 1
90 --> 1
85 --> 1
80 --> 1
75 --> 3
70 --> 1
65 -->1
60 -->1
55 --> 1
50 --> 2
45 -->1
40 -->1
35-->1
30-->1
25-->2
20-->1
15-->1
10-->1
5-->1
totally 24 5's...

Is This Answer Correct ?    8 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Fathers age is 5 times his son's age. 4 years back the father was 9 times older than son.Find the fathers' age.

724


Hansie made the following amounts in seven games of cricket in India: Rs.10, Rs.15, Rs.21, Rs.12, Rs.18, Rs.19 and Rs.17(all figures in crores of course).Find his average earnings.

894


2. Why would you choose a database system instead of simply storing data in operating system files? Give and explain advantages of using DBMS.

1026


A man can row downstream at a rate of 14 kmpl & upstream at 9 kmpl. Find man's rate in still water ?

876


Technical questions

1388






What number comes next 10, 9, 60, 90, 70 and 66?

809


two trees are there. one grows at 3/5 of the other. in 4 years, total growth of trees is 8 ft. what growth will smaller tree will have in 2 years.

757


There were 36 chairs. how many ways can they be placed such that all rows have equal no. of chairs and atleast three chairs are there in each row and there are atleast three rows.

877


Some work is done by two people in 24 minutes. One of them can do this work alone in 40 minutes. How much time does the second person take to do the same work ?

712


3 red and 4 blue balls are in a basket. A member of PPTeam is drawing balls from the basket.What is the probablity of getting the 3 red balls simultaneously?

818


In 6 seconds a light flashes once. In one hour how many times it will flash?

847


Rakesh buys 1 gallon of milk for Rs.12 and mixes it with 20% water. He then sells it for Rs.15, What is the percentage of gain that Rakesh would get.

731


A person who decided to go weekend trip should not exceed 8 hours driving in a day Average speed of forward journy is 40 mph. due to traffic in sundays, the return journey average speed is 30 mph. how far he can select a picnic spot

945


new town is straight to the north of new york. A high way m runs from newtown making an angle of 61 degree south east. From new york there is also an high way n which runs northeast 61 degrees. If high ways m and n are straight then find out the acute angle made at their intersection point.

687


If x and x+10 are lengths containing right angle, what is the equation if area is 24 sq.cm

668