Mystery Number

Use the clues to help discover the mystery number. 

• It is a three digit number.
• The sum of the last two digits equals the first digit.
• The first and third digit are odd.
• The first digit is 1 more than the second.
• The sum of all three numbers is 10.

What is the mystery number?

Supermarket Grand Opening

It is the grand opening of a local supermarket.  Every 5th customer will receive a coupon for a free turkey and every 7th customer will receive a coupon for a free half-gallon of ice cream.  If 100 customers come in on opening day, how many will get a free turkey and a free half gallon of ice cream?

Penny a Day

You have just won a contest!
You must choose between 2 prizes. You may choose $.75 a day for 15 days or you may choose a penny the 1st day, which doubles every day for 15 days. Find out which prize you would choose.
Please do a writing (using good math language and symbols), which tells how and why you made your choice. Include a chart, graph or table that helped you solve the problem.

Farmer Fiona

Farmer Fiona raises cows and chickens. In all, her animals have 20 heads and 70 legs. How many cows and chickens does she have?  Please remember to fully explain your thinking and the strategy you used. 

Disappearing Cookies

Kathy had fun baking lots of cookies. She left them on a plate to cool while she went shopping with her dad. Her brother saw the cookies and took 1/2 of them to his Scout meeting. Her sister took 2/3 of the remaining cookies to share with her friends. Finally, her mom took 1/2 of the remaining cookies to her Book Club meeting. When Kathy and her dad got home, there were only 5 cookies left on the plate.

How many cookies had Kathy baked?

Is Dan Losing His Marbles?

Dan played 3 games of marbles. In the 1st game, he lost 1/2 of his marbles. In the 2nd game he won 4 marbles. In the 3rd game, he won the same number of marbles as he had at the end of the 2nd game. He finished with 32 marbles. How many marbles did Dan start with?

Mrs. McKegney's Floor

Mrs. McKegney wants to tile her kitchen floor. The tiles are 3 inches on each side. The floor is 10' x 15'. How many tiles does she need?

The tiles are sold in bundles of 10. Each bundle costs $3.50. How many bundles are needed? How much will she need to pay for the tiles?

Write a letter to Mrs. McKegney clearly explaining your solution to her tile problem and how you went about solving the problem. Be sure to include a visual representation of your solution and observations that you made.