Question

show that 12n cannot end with digit zero for any n£n​

Answer 1

for this we have to find first the factor of 12

: 12 - 2*2*3

it can't be end with 0

because if any no. end with O itch should be factor of 5 and 2 both

but this no. have only 2 factor not 5 ....

it is not divisible by 5