Question

Find the number of integers between 50 and 400, which are divisible by 7. *

Answer 1

Answer:

50 integers

Step-by-step explanation:

first number after 50 divisible by 7 , a1 = 56

 last number divisible by 7 less than 400 an = 399

common difference , d = 7

an = a + (n-1) d

399 = 56 + (n-1) 7

343 = 7n - 7

350 = 7n

n = 50