The End Digits

/by

What are the last two digits of a huge number?

Read more

What Number Is It?

/by

Determine a number given its particular properties.

Read more

Coefficients that Affect the Graph

/by

Observe changes in functions as you modify their coefficients.

Read more

Difference of Squares

/by

Write a given number as the difference of two squares.

Read more

Ending a Perfect Square

/by

Find a special number that can make other numbers into perfect squares.

Read more

Who Wants to Win One Million?

/by

Find particular factors that produce 1,000,000.

Read more

Fortune Telling

/by

Using only a digit and the four basic operations (+, -, x, /), produce a set of numbers.

Read more

Inside a Domain

/by

Find all the whole numbers that can replace the variable x in a given expression so that the expression has a particular value.

Read more

100 Sums

/by

Do any numbers from a given set have a sum of 100?

Read more

How Many Thousands?

/by

Find possible values of a digit in an eight-digit number when you know one of its divisors.

Read more