Question

a boy who earns money like this- first day 3 rupees, second day 5 rupees and third day so on.. for 30 days. Without making calculations find out how many rupees he got in 30 days​

Answer 1

a=3

d=2

an=a+(n-1)d

an=3+(30-1)2

an=3+60-2

=61

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