Question

Father gives his son 10 Rs on his 1st birthday . On each successive birthday, He gives 20 Rs more than previous birthday. On which birthday he will get 4000 Rs?

Answer 1

Answer:

on his 20th birthday he will get 4080Rs. from his father

Step-by-step explanation:

On first he get 10Rs. and it is said in question he will get 20Rs. more than previous birthday and so on so we will add 20 in 10 for second birthday money and he will get 30Rs. and further on adding 20 with the resultant money of that birthday.