Question

The remainder of obtained ,when 1! +2+ + 3! ...+ 175! is divided by 15 is

Answer 1

Answer:

3

Step-by-step explanation:

check the factorial for a multiple of 15

1!=1

2!=2*1

3!=3*2*1

4!=4*3*2*1

5!=5*4*3*2*1

in 5! there is 15 so avoid number from 5! to 175! and add all the values till 4!

that implies 33 since it is greater than 15 divide 33 by 15 . we obtain 3 as remainder