Question

How many 2 digit numbers are there between 1 to 90

Answer 1

Answer:

Hey Mate

Here Is Your Answer

a=10

d=1

90=a+(n-1)d

90=10+(n-1)1

90-10=n-1

80+1=n

81=n

Hope It Will Help

MARK IT AS BRAINLIEST

REGARDS

GUNJAN

Answer 2

Answer:

"The total number of two digit numbers is 90. From 1 to 99 there are 99 numbers, out of which there are 9 one-digit numbers, i.e., 1, 2, 3, 4, 5, 6, 7, 8 and 9. If one digit numbers are subtracted from 99 we get 90 two-digit numbers."