Mental Squaring
Square two-digit numbers in your head.
Author Archive for: corrill
Entries by InterMath
Abundant, Deficient, and Perfect
Find patterns among abundant, deficient, and perfect numbers.
Abundant Numbers III
Examine abundant numbers.
Abundant Numbers II
Determine if Sam’s claim about abundant numbers is true.
Abundant Numbers
Find abundant numbers.
Locker Counting
Which locker doors will be open when a given process is complete?
Divisibility by Eight
Explore a possible rule for checking divisibility by eight.
Multiples of Nine
Find a relationship pertaining to the digits in a multiple of 9.
Don’t Just Say “It’s Undefined”
Consider division by 0 and 1.
Cutting Hair
Determine how long a hair cutter works on a busy day.