Twenty eight matches were played in a volley ball tournament. Each team playing one against each of others. How many teams were there?

One angle of a linear pair is twice the other. How mụch is each?

Of the number of three athletic teams in a school, 21 are in the basket ball team , 26 in hockey team and 20 in the football team, 14 play hockey and basket ball , 15 play hockey and football, 12 play football and basket ball and 8 play all the games. How many members are there in all?

There are 25 children in one room and 35 in another. 5 biscuits are to be given to each. How many biscuits are needed?

It was found at a certain dinner meeting that after every member had shaken hand with every other members, 45 handshakes were interchanged. How many members were present at the meeting?

A class has 4 more girls than boys. One day when only 8 boys were absent, the number of girls were twice that of boys. How many girls and boys are there in the class?

In a group of athletic team in a school 21 are in the basket ball team,26 in the hockey team and 29 in the football team.If 14 play hockey and basketball,12 play football and basket ball,15 play hockey and football and 8 play all the three games,find the following. How many players are there?

In a class of 35 students , 24 likes to play cricket ,16 likes to play football. Also each student like to play at least one of the two game . How many likes to play both cricket and football?

Suppose that in a party there are 15 persons If each two of the 15 persons shake hands, with each other, how many handshakes happen in the party