How many things has a pair
A pair has two things
How many things has a dozen
A dozen has twelve things
How many things has a score
A score has twenty things
How many paper sheets has a quire
A quire has 24 sheets of paper
How many quires make a ream
20 quires make a ream
How many meters make a kilometres
1000 metres make a kilometer
How many grams make a kilogram
1000 grams make a kilogram
How many hours make a day
24 hours make a day



