Question

how many three digit numbers are divisible by 7

arithmetic progression
please answer i need help...​

Answer 1

Answer:

128

Explanation:

Three digit numbers are divisible by 7 are

105, 112, 119,..........,994

last term = 994

a + (n-1)d = 994

105 + (n-1)7 = 994

(n-1)7 = 994 -105

(n-1)7 = 889

(n-1) = 889÷7

n-1= 127

n = 128

Therefore 994 is the 128th term

hence number of three digit numbers divisible by 7 are 128