Apple Numbers '08 - Manual (Page 251)

Chapter 12 Dictionary of Functions 251
MODE
The MODE function finds the most frequently occurring value in a set of numbers.
MODE(number, [number, . . .])
 number: A set of numbers, numeric expressions, or references to cells containing
numbers or numeric expressions.
Notes
If more than one number occurs multiple times in the arguments, MODE returns the
first qualifying number.
If no value occurs more than once, MODE reports an error.
MONTH
The MONTH function extracts the month number from a date.
MONTH(date)
 date-time: Any valid Numbers date.
Examples
MOD(6, 3) returns 0.
MOD(7, 3) returns 1.
MOD(8, 3) returns 2.
MOD(-8, 3) returns 1.
MOD(4.5, 2) returns 0.5.
MOD(7, 0.75) returns 0.25.
Examples
MODE(5, 5, 5, 5, 6) returns 5.
MODE(1, 2, 3, 4, 5) returns an error.
MODE(2, 2, 4, 6, 6) returns 2.
MODE(6, 6, 4, 2, 2) returns 6.
Examples
MONTH("April 6, 1988 11:59:22 AM") returns 4.