Seven Envy
Use the same whole number and the operations +, -, x, and ÷ to produce a certain number.
Author Archive for: corrill
Entries by InterMath
Squares inside Squares
Find the four-digit number that fits the description.
Impossible Scores
What is the highest score below 100 that is impossible to score on a given dart board?
Five Alive
If you wrote a list of consecutive whole numbers, how many times would you write the digit 5?
Multiple Digits
Betty wrote a list of consecutive whole numbers starting with the number 1. If you know how many digits she used, can you determine the last number Betty wrote?
Aging Adults
If you know the product of two adults’ ages, can you determine the age of the younger adult?
Know Your ABC’s
Determine the product of abc under certain restrictions.
Sharing Cookies
In how many ways could Moe, Larry, and Curly share eight cookies?
Even Factors
Examine numbers whose factors are all even, except for the number 1.
Five Divisors
Use the digits 1, 2, 3, 4, and 5 to make a number that fits the description.