Question

Every year a man is paid Rs 500more than the previous year. If he receives Rs 17800 over four years, what was he paid on the first year

Answer 1

Let X = first year payment
X + (X+500) + (X+2*500) + (X+3*500) = 17800
4X + 3000 = 17800
4X = 14800
X = 3700

Answer 2

is there easier way to do for 10 years