1.N=7!3 How many factors of N are multiple of 10?(a)736,(b)1008,(c)1352,(d)894.
2.What is the max value of HCF of [n2+1] and [(n+1)2+17](a)69,(b)85,(c)170,(d)None.
n/a
7! = 2 x 3 x 4 x 5 x 6 x 7= 24 x 32 x 5 x 7
And 7! 3= 212 x 36 x 53 x 73
For 10 we need at least one 5 and one 2Taking one of those factors we get 211 x 36 x 52 x 73
Total number of factors of the above number= 12 x 7 x 3 x 4= 144 x 7 = 1008
More information about formatting options
7!
= 2 x 3 x 4 x 5 x 6 x 7
= 24 x 32 x 5 x 7
And 7! 3
= 212 x 36 x 53 x 73
For 10 we need at least one 5 and one 2
Taking one of those factors we get
211 x 36 x 52 x 73
Total number of factors of the above number
= 12 x 7 x 3 x 4
= 144 x 7 = 1008
n/a
Post new comment