Question

how many 2 digits number leave the reminder 1.when it is divided by 5.. solve by arithmetic progression.... ​

Answer 1

Answer:

11,16,21,....,96

here

a=11,d=5

tn=a+(n-1)d

96=11+(n-1)5

96-11=(n-1)5

85=(n-1)5

15=n-1

n=16

There are 16 two digit numbers...........