A grandfather gives his grandson as much money every day as the number of the day of the month.
How much money did he give in January?
1,2,3,4,5,6,7,8,...............,31
It is an AP sequence
First term =1
Last term =31
Sum=(31+1)/2 *31=16*31=496
google-site-verification: google5db3bc4d7edda0a0.html
No comments:
Post a Comment