Question

23a7b divisible by 45 but not by 10.find value of a

Answer 1

Answer:

a=1,6

Step-by-step explanation:

45 is÷ by 9,5

assume b=0

=2+3+a+7+b

=12+a is÷ by 9, it's÷ when a=6

if b=5

=2+3+a+7+b

=12+a+5

=17+a is÷ by 9, it's÷ when a=1

therefore a=1,6