Question

how many numbers are between 1to 200which are exactly divisible by 7​

Answer 1

it is arithmeatic progression question

Answer 2

by AP

nos. divisible by 7 are

7,14,21.......196

here,t1=a=7

t2=14

d=7

by formula,

tn=a+(n-1)d

196=7+(n-1)7

196-7=7(n-1)

189/7=n-1

27+1=n

thus n=28

thus,28 nos are divided