self Maths Puzzle

Can you find a quick and elegant way to add the numbers from 1 to 34 ?

In other words, what is the sum you obtain in the following case:

1 + 2 + 3 + ....... + 34 =

Read Solution (Total 2)

self Other Question

A painting job can be completed by 8 painters in 17 days. If 8 more painters join the team 3 days after starting work on the job, then how many more days are required to complete the job? It was Elizabeth's first day at school. The teacher suggested that it would be a good idea for each child to meet every other child in the class. The teacher said, "When you meet, please shake hands and introduce yourself by name."

If there were 10 children in the class, how many total handshakes were there?