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## Answers

105, 110, 115,120,......195.

The above list in AP wit a=105, d=5, and an=195.

an=a+(n-1)d

105+(n-1)5=195

(n-1)5=90

n-1=18

n=18-1=17

ie,n=17//

Sn=n/2[2a+(n-1)d]

S24=17/2[2(105)+(17-1)5)]

=17/2[210+16*5]

=17/2[210+80]

=17/2[290]

=17*145

=2465//