Useful facts

Times Tables

20 times tables

First 50 squares

 

Prime Numbers

List of first fifteen prime numbers
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47

Time

60 seconds = 1 minute
60 minutes = 1 hour
24 hours = 1 day
7 days = 1 week
52 weeks = 1 year

 365 days = normal year
366 days = leap year

   

  Leap years are divisible by 4
Centuries are not leap years unless divisible by 400

 

Calendar

January   31 days
February   28 days (29 in leap year)
March     31 days
April        30 days
May     31 days
June           30 days
July         31 days
August     31 days
September  30 days
October   31 days
November  30 days
December  31 days 

12 hour and 24 hour clock

12 hour clock times are written with
am to represent morning
and pm to represent afternoon.
A colon is used to separate minutes.