Past Challenges

Magic Square:

Place each whole number from 1 thru 25 into the square below, using each number once. so that every row, every column, and the two diagonals add up to 65.

In 7th grade, we are learning about converting fractions to decimals and vice versa. Remember, all fractions have a decimal equivalent that either: 1) terminates or 2) repeats.

Here is a classic: what is the exact decimal for

Hint: the answer is NOT pretty!

Get a separate sheet of paper and work these match-stick puzzles. They are fun!

The wishy-washy salesman.

Your Mom and Dad say you can have a car as long as you buy it yourself. You locate your DREAM car that you just have to have..... the only problem is that it is more expense than you can afford.

Here's the problem: The salesman that you are trying to buy the car from keeps on reducing the price of the car, but then raising it a day later. This goes on until you finally think you have the price that you can afford. What is the price if the salesman did the following:

	Original price of car: $14,000
	Day 1: price reduced 10%
	Day 2: price raised 10%
	Day 3: price reduced 15%
	Day 4: price raised 15%
	Day 5: price reduced 20%

You decide to purchase the car after Day 5. What did you pay for the car? Fill in the table below to get credit for this problem

Original price of car	$14,000
Price after Day 1 (10% reduced)
Price after Day 2 (10% increased)
Price after Day 3 (15% reduced)
Price after Day 4 (15% increased)
Price you buy the car for (20% reduced)

Try this pie chart exercise: what is the value of "x"?

What does x equal. Hint: the sum of a pie chart is always equal to 100.

Solve for b. (It's not as easy as it looks)

Give the result in base 7. If you're real good, give me the base 10 equivalent.

Simplify (last week's might have been a little to easy):

Simplify this complex fraction (show your work):

Simplify: