Question

how many 3 digit numbers are there divisible by 3 find their sum

Answer 1

this is an AP with a=102, d=3, l=999

l=a+(n-1)d

= 999 = 102+3(n-1)

= 897= 3(n-1)

= 299 = n-1

= n=300

sum = 300/2 (2*102+ 299*3)

= 150(204+897)

= 1101*150

= 165150

Answer 2

HEy user here is your answer in the pic ....
Hope it helps you!!!!!!!
@JAat...