Question

Find the sum of all two digit no divisible by 5 leaves remainder 2

Answer 1

attached your solution

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the sum of two digit no divisible by 5 is 945....

Answer 2

ans: 981

$981$

S

n=n/2(2a+(n-1)d)

where

n=18

a=12

d=5

Sn=18/2(12+97)=9(109)

Sn =981