5th grade

On average, how long does each president stay in office?

- George Washington became president in 1789
- George W. Bush was the 43rd president

9th-12th grade

What whole number is closest to 1/∞ ?

Why?

7th - 11th grade

In Deal or no Deal 1 case is worth $1 Million. The other cases are not. The player selects a case, then begins to open the other cases. After 18 cases have been opened and found to not have the $1 Million, there are two cases left. The player then has a chance to switch cases. Should the player switch cases?


Hint: What is the probability the $1 million is in the original case, and what is the probability that it is in the other case? They're not the same!

Place Value 4th-12th grade

4th grade:

Which digit is in the 10s place of 68x68?

6th grade:

Which digit is in the thousandths place of 1/7?

7th grade:

Which digit is in the thousandths place of 1/2% of 325% of 11/8?

9th - 12th grade:

Which digit is in the ones place of 4^307?

3rd - 4th grade

The low temperature tomorrow could be as low as 22 degrees below zero. If it is 72 degrees inside, how much colder is it outside than inside?

5th - 7th grade

The average low temperature for three days was 12 degrees. The next two days the low temperature was -20 degrees, and -16 degrees. After the 6th day the average low temperature was -22 degrees. What was the low temperature on the 6th day?

11th grade

6 students are waiting in line for lunch. How many different ways can those 6 students order themselves in line?