1.

Find the sum of all 2 digit multiples of 8 .

Answer»

Step-by-step EXPLANATION:

SOLUTION:-

First the 2digit multiples of 8 are=16,24,32......96

Where

a=16

l=96

Common difference=(d)=24-16=8

  • We need to find the sum
  • Let's use formula of AP

{\boxed{S{}_n={\dfrac {n}{2}}(a+l)}}

{:}\longmapset{\dfrac {12}{2}}(16+96)

{:}\longmapset6×(112)

{:}\longmapset{\underline{\boxed{\bf {S_n=696 }}}}


Discussion

No Comment Found

Related InterviewSolutions