CM Magazine: The Little Math Puzzle Contest

## The Little Math Puzzle Contest

Man seeks order and pattern in all things

### Puzzle #24

What is the next letter in this set?

B, C, D, E, G, P, T, ___

hint: you are to select from the remaining letters (U, V, W, X, Y, Z)

This puzzle comes from Bill Stuebing who is one parent of a class in Red Deer Alberta.

Send your response by 8:00 a.m., Friday, March 8 to: math_puzzle@rwa.psbgm.qc.ca

### Puzzle #22 was the following:

What is the next number in this pattern

16, 24, 36, 54, ___

### The answer to Puzzle #22 is below:

The expected answer was 81

to get the next number you add half the current number
16 + 1/2 of 16 = 24 . . . 36 + 1/2 of 36 = 54 . . . 54 + 27 = 81

another solution is 86

explained by Sylvia Champion, Gr. 7A, Mennonite Brethren Collegiate Inst., Winnipeg, MB reasoning:

The second digit alternates between 4 and 6.
The first digit comes from adding the last two first digits together.

a third solution was 80

explained by Justin Cormier, Stephen McKim, Mike Davidson, Grade 8B Riverview Middle School - Riverview, New Brunswick. reasoning:

taking the difference between 16-24 as 8, 24-36 as 12, 36-54 as 18
I added the difference betwwen 8-12=4, 12-18=6, to the previous difference.
The next number I see is 18+8=26 added to 54 gives my solution of 80.

### The Winners -- Solvers of Puzzle #20

The people who answered puzzle #22 with 81 were:

1. Alex Ferreira Grade 5 St. Margaret's School - Sarnia, Ontario
2. Brianne Kennedy, Kara Ciccarelli - Ms. Laudonio Gregory Hogan School - Sarnia, Canada
3. Rudi Jaclyn and the rest of Mr. Davis' grade 5 class. Sheridan school - Oakville Ont. Canada
4. Paige Aarhus, Breanna Jensen gr5 Corinne Saunders, Caitlin Klien, Stephanie Stol, Kelly Woods - gr 4 Joseph Welsh Elementary School - Red Deer, Alberta
5. T. Burnie's Gr 7/8 class St Ann Catholic School - Toronto, Ontario
6. Van Nguyen in O. Piruckyj's Gr 8 class D'Arcy McGee Catholic School - Toronto, Ontario
7. Gabrielle Kern - Mr. J. Cowley (6th Grade) Sacred Heart Elementary School - Sarnia, Ontario
8. Mrs. Christian's Grade 3's and Mr. Lockwood's 3/4's Stanley Public School - North York, Ontario, Canada.
9. Phil Langford, Gr. 8 Mennonite Brethren Collegiate Inst. - Winnipeg, MB
10. Terry Anderton, Grade 5 Piper Creek Elementary School - Red Deer AB
11. Kaitlin Boone - Mrs. Seltzer's fourth grade class Indian Lakes Elementary School - Virginia Beach, VA
12. Mrs. Dockrill's grade 2 class St. Peter Canisius School - Watford, Ontario.
13. Paige Aarhus, gr5, Joseph Welsh Elementary School - Red Deer, Alberta
14. wendy johnson

The people who answered puzzle #22 with 86 were:

15. Mrs. Jones' grade 6/7 class K. V. M. School - Burtts Corner,N.B.
16. Chris Janz - Grade 8 Class General Vanier School - Winnipeg, Manitoba
17. Jon Stevenson - Grade 7/8 St. Andrew School - Windsor, Ontario
18. Ms. Hatfield's Grade 4 class St. Margaret's School - Sarnia, Ontario
19. Leigh Perkins Keswick Valley Memorial School - Burtts Corner,N.B
20. Christopher Reid Gr.4 Stanley Elem. School - Stanley , N.B.
21. Mrs. Harris's grade 4/5 class St. Margaret's School - Sarnia, Ontario
22. Tara O'Rourke, Clyde Dohey, Tony Coffey, Charlene Conway, Freddie Hardy - Level One Fatima Academy - St.Bride's, Newfoundland.
23. Rena, Kayla, Lori, Jacinta et Stacey Madame Scaplen's grade 6 French Immersion class Sacred Heart Elementary - Marystown, Newfoundland

The people who answered puzzle #22 with 80 were:

24. Justin Cormier, Stephen McKim, Mike Davidson - Grade 8B Riverview Middle School - Riverview, New Brunswick.
25. Bryan Penfound - Mrs Sutherland's Gr 6 Class St Philip's School - Petrolia Ont
26. Class 7-c Park Junior High - Sydney,Nova Scotia
27. Rosalie Evans, Josh Ulla - Mr.White's grade 5/6 class: Brooklyn District School - Newport, Hants Co. N.S.
28. Nicky B. Ecole St. Avila - Wpg., MB
29. Dave McFarland, Cassandra Cope, Alida Pokoradi - Grade 6 Mr. Czerneda C.H. Bray Public School - Ancaster, Ontario

Andrea Pollock and Alex Nazarov
math_puzzle@rwa.psbgm.qc.ca
Royal West Academy, Montreal West, Quebec.

Information about the Little Math Puzzle Contest.

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