Question

the positive integer less than or equal to 1000 are divisible by 14 are

Answer 1

14 , 28 , 42 ....... 994 which forms an A.P.
using formula, an = a + (n-1) d
994 = 14 + ( n - 1 ) 14
980 = 14n - 14
994 = 14n
n = 71