Challenge 24 Competition
The Challenge 24 Competition is a mathematics competition for 3rd-, 4th-, 5th-, 6th-, and 7th-graders, hosted each spring by the SBU Department of Mathematics. Participants play the 24 Game, which involves a deck of cards, each showing four whole numbers between 1 and 9. When presented with a card, the players strive to be the first to combine the four numbers to make 24 using only addition, subtraction, multiplication, or division. Many cards have more than one solution. The game can be surprisingly challenging, but the participants in Challenge 24 are quite good, having previously won competitions within their own schools. The coordinator for the SBU Challenge 24 Competition is Ms. Angela Colomaio (acolomaio@sbu.edu).
The 24 Game was developed in 1988 by Robert Sun to provide students with a fun way to discover patterns among numbers. Sun founded the company Suntex International Inc. to market the game.
Each card in the 24 Game is marked with one dot, two dots, or three dots to indicate its level of difficulty. Generally, the higher the number of dots, the more challenging the card. To the right is a two-dot card containing the numbers 2, 3, 4, and 4. Try making 24 with the numbers on this card. Remember: you must use each of the numbers 2, 3, 4, and 4 exactly once and the only operations you may use are addition, subtraction, multiplication, and division. (Since you must use each of the numbers 2, 3, 4, and 4 exactly once, you will end up using 4 twice.) You do not need to use all four of the operations and you may use an operation more than once. There are three essentially different solutions for this card. Can you find all of them? Clicking the buttons below the card will reveal these solutions.
To SBU Students: Help!
The Department of Mathematics needs about 30 volunteers to run the Challenge 24 Competition. If you would like to work with kids who love math, sign up to help us! Elementary education majors are particularly encouraged to volunteer. The competition is held on a Saturday in March or early April. The next competition will be planned in the fall, at which time volunteers will be solicited by Ms. Colomaio by email and in mathematics classes.
The 2015 Challenge 24 Competition
The 2015 Challenge 24 Competition was held on Saturday, March 28. The competition was organized by Dr. Doug Cashing. There were fifty-five students from six schools attending this year. The participating schools were Allegany-Limestone, Austin Area, East View Elementary (in Olean), Hinsdale, Olean Intermediate-Middle School, and Otto-Eldred. Medals, in the traditional colors of gold, silver, and bronze, were awarded to the first, second, and third place students in each grade. Congratulations to all!
3rd Grade |
First Place |
Brysen Riehle (East View Elementary) |
Second Place |
Riti Anumalasetty (East View Elementary) |
Third Place |
Sughosh Kondur (East View Elementary) |
4th Grade |
First Place |
Emma Dwaileebe (Olean Intermediate-Middle School) |
Second Place |
Chance Padlo (Olean Intermediate-Middle School) |
Third Place |
Austin Cousins (Otto-Eldred) |
5th Grade |
First Place |
Abbey Wolfe (Otto-Eldred) |
Second Place |
Hannah Nelson (Olean Intermediate-Middle School) |
Third Place |
Mathius Spinney (Otto-Eldred) |
6th Grade |
First Place |
Yuki Wada (Olean Intermediate-Middle School) |
Second Place |
Marina Heister (Olean Intermediate-Middle School) |
Third Place |
Jason Copella (Olean Intermediate-Middle School) |
7th Grade |
First Place |
Mackenzie Windus (Olean Intermediate-Middle School) |
Second Place |
Quinn Forrest (Olean Intermediate-Middle School) |
Third Place |
Chloe Proctor (Olean Intermediate-Middle School) |
Previous Challenge 24 Competitions
For the participating schools and the winners for our earlier Challenge 24 Competitions dating back to 2004, please see Previous Challenge 24 Competitions.