What is the sum of all numbers between 100 and 1000 which are divisible by 14 ?

One Answer on this Question

1. The numbers that lie between 100 and 1000 which are divisible by 14 are 112, 126,140 …,994
   a = 112; l = 994, d = 14
   n= (l−a)/d+1
   = (994-112)/14+1
   = 64
   Sn=n/2(l+a)
   = 64/2(994+112)
   = 32*1106
   = 35392

   Reply