Question

The number n = 2 X 3 X 5 X 7 + 5 is​

Answer 1

For unit digit to be 5

we choose at least one 5 and any number of odd prime factor but not 2 as by multiplying 5 with 2 we get unit digit as 0 .once we got unit place as zero we can not be able to get 5 at unit place.

so ans=4*(5+1)*(3+1)*(2+1)

=4*6*4*3

=96*3

=288

Answer 2

Answer:

2 × 3 × 5 × 7 + 5

= 6 × 5 × 7 + 5

= 30 × 7 + 5

= 210 + 5

Answer- 215