Question

how many 2 digit no. are divisible by 4 find with the help of A.P.

Answer 1

22 two digit numbers are divisible by 4

Answer 2

two digits no. divisible by 4 are:

12, 16, 20,...............................96


a = 12

d = 4

an = 96


an = a + ( n - 1 ) d

96 = 12 + ( n - 1 ) 4

96 - 12 = ( n - 1 ) 4

84 ÷ 4 = n - 1

21 = n - 1

21 + 1 = n

n = 22

Answer: there are 22 two digit no. are divisible by 4.



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