Not all months are the exact same size since months of the year have different numbers of days. The shortest month of the year is February; it gets an extra day on leap years. 7 months (January, March, May, July, August, October, & December) tie for 1st place as the longest! Any month unmentioned on this page is in an 8th place tie.
Yep, you guessed it! 29½ is the average of this list: {28, 29, 30, 31}, which is how many days each month of the year is likely to have. By the way, the sum of the 4 figures is 118. Also, notice that a short February is exactly equal to 4 weeks!
Back to Index Page Back to Math Trick Menu
© Derek Cumberbatch