Wednesday, August 25, 2010

6th - 8th grade

Last year the Vikings had a 12-4 record. The Twins play 162 games per season. If they have the same winning percentage as the Vikings, how many games will they win?

Tuesday, August 24, 2010

5th - 12th grade

Continue the pattern
1, 2, 10, 11, 12, 20, 21, 22, 100, 101, ...

6th - 8th grade

Megan's summer job pays either minimum wage ($7.25 per hour) or 20% commission on what she sells. If megan works for 8 hours and sells $450 worth of stuff, should she be paid minimum wage or commission?

Bonus: If she takes the commission, what is the equivalent hourly rate?

Double Bonus: If she takes the hourly wage what is the equivalent percent commission?

6th - 8th grade

How many 6 inch cubes can fit in a one yard cube?

6th - 12th grade

Factorial (!) means to multiply by every positive number equal to or lower than the given number. For example, 5! 5x4x3x2x1=120.

Calculate 10!

Tuesday, October 27, 2009

4th thru 7th Grade

There are two different ways of making one
dollar using 11 coins, which must be quarters,
dimes and nickels, with at least one of each.

What are these two ways?

7th Grade

The sum of 5 numbers is odd. Which of the followings statements must be true?
a) There are an odd number of even numbers.
b) There is an even number of odd numbers.
c) There are an odd number of odd numbers.
d) There are no even numbers.

7th Grade

A digital clock shows either 3 digits of 4 digits at a time.

What time it when the digits have their greatest sum?

Tuesday, September 8, 2009

5th - 8th grade

Bill has 7 students in his basketball team. Only 5 can play at once. How many different groups of 5 students can have on the court at a time?

Hint: it's easier to think of the reverse of this questions - how many different groups of 2 students can sit on the bench.

3rd grade

3 gum balls cost a 25 cents. How much does it cost to buy 12 gum balls?

Monday, August 10, 2009

7th - 10th grade

An iphone screen is 3.5" measured diagonally at a ratio of 3:2. Jennie's TV is 31.5" measured diagonally and at a ratio of 16:9. How many iphone screens would it take to make a picture the size of Jennie's TV?

4th - 6th grade

Saibu plays video games for 90 minutes every day. After one year, how many days(use fractions if necessary) has he spent playing video games?

5th - 7th grade

Road Trip Math:

Peter is going on a road trip with two friends. The total length of the trip is 368 miles each way. Gas costs $2.49 per gallon, and Peter's car gets 31 mpg. How much should each friend give Peter for gas money?

4th - 12th grade

Count the rectangles.

5th - 7th grade

Mathnasium has a "perfect page day" whenever a student correctly guesses the roll of a 6 sided die. There is one chance per day. If Mathnasium is open 5 days per week, on average how many perfect page days will there be per year?

5th - 7th grade

Nate and Peter had a counting contest. Whoever could count past 100 first won. They each counted a number every 2 seconds. Nate counted by 5s, Peter counted by prime numbers. Who won, and by how many seconds did he win?

Tuesday, July 14, 2009

3rd Grade thru 5th Grade

Using only pennies, dimes, and nickels, name 21 coins that have a total value of exactly $1. You must use at least one coin of each type.

Friday, July 10, 2009

6th - 7th Grade


In this problem, A, B, and C represent different digits and A is not zero. What are the values of A, B, and C ?

Tuesday, June 2, 2009

Algebra 1

Hank and Joe each want to buy a tennis ball. Hank still needs $0.28 to buy the ball and Joe still needs $1.12 to buy the ball. If they combine their money, they still do not have enough to buy the ball. What is the most the ball could cost?

4th thru 7th Grade

Your ship sinks and you swim to a nearby island. On this island, the inhabitants do not use money. The island residents use island fruit as money. If
· 60 bananas = 20 coconuts
· 35 figs = 15 oranges
· 10 coconuts = 25 figs
· 200 figs = 1 boat
How many bananas would you need to purchase a boat to get off the island?