Question

how many two digit numbers are divisible by six( arthemetic progression) ?

Answer 1

2and 3i think correct

Answer 2

Two digits no are from 10 to 99

Divisible by 6= 12,18,24,......96

A.P= 12,18,24,........90,96

a=12, d=18-12=6, an= 96

An= a+( n-1) d

96= 12+ (n-1) 6

96-12= 6n-6

84= 6n-6

84+6= 6n

6n= 90

n= 90/6=15

Your answer is 15