1.- 7 crossings in a road
2.- 5 letters from the alphabet are vowels
3,- 9 people in Social Security
4.- 24 seats in an international flight
5.- 3 wagons in a train
6,. 13 laboratories in a building Department
8.- 12 nuns in a convent
9.- 29 Days in February in Leap Year
10.- 90 Degrees in a right angle