Caribou
Mathematics Competition
Brock University Caribou Mathematics Competition
English | Français
(905) 688-5550 ext. 3300

## Calcrostic Puzzle

We call these problems calcrostic because they are showing calculations in a form similar to acrostic word puzzles. The color in the puzzle is used to indicate the computations in the rows, columns and diagonals. In a calcrostic, like
```                       ab × cd = ebaf
+ ×  ÷ ÷    −
egf ×  h =  hdc
= =  = =    =
ejc ×  k =  bfj
```
each letter represents a digit (one of 0,1,2,3,4,5,6,7,8,9). Equal letters represent equal digits, different letters represent different digits. The 9 resulting numbers ab, cd, ebaf, egf, h, hdc, ejc, k, bfj may have more than one digit (for example, ab is a 2-digit number) and are arranged in a 3 × 3 square as above. These numbers satisfy 3 horizontal, 3 vertical and 2 diagonal relations (like the diagonal relation ab × h = bfj where × stands for multiplication and ÷ for division. The problem is to find the value of each letter.

For example, the puzzle above has the solution
```                       54 × 27 = 1458
+ ×  ÷ ÷    −
108 ×  9 =  972
= =  = =    =
162 ×  3 =  486
```
Simpler versions of this type of puzzle will appear in future caribou contests, starting January 2010.

Have fun!

## (Les mercredis)

LE MERCREDI 23 OCTOBRE 2013

## Résultats précédents

### Top 10

1er
Serena Zhang
Mackenzie Community School, ON
2e
Gorden Tseng
Maple Ridge Secondary, BC
3e
Kevin Chi
Mackenzie Community School, ON
4e
Ann Chen
Maple Ridge Secondary, BC
5e
Winston Leung
École Royal Vale, QC
6e
Thomas Jeong-ho Song
Maple Ridge Secondary, BC
7e
Annika Polert
École Royal Vale, QC
8e
Derek Maroney
Maple Ridge Secondary, BC
9e
Evgeni Maiseyeu
Maple Ridge Secondary, BC
10e
Zahra Altalibi
École Royal Vale, QC

Résultats Détaillés

### Top 10

1er
Victor Lamoureux
Astral Drive Junior H.S., NS
2e
Kevin Genereux
St. Ignatius S.S., ON
3e
Jingfeng Shan
École Royal Vale, QC
4e
Jae Hyoung Hur
École Royal Vale, QC
5e
Alex Oxorn
École Royal Vale, QC
6e
Jeff Mason
Sacred Heart H.S., ON
7e
Aidan Bermingham
École Royal Vale, QC
8e
Hyunsu An
École Royal Vale, QC
9e
Rachel Ross
Astral Drive Junior H.S., NS
10e
William Goodman
École Royal Vale, QC

Résultats Détaillés

### Top 10

1er
Chenyan Wang
Homelands Senior P.S., ON
2e
Max Shao
École Marie-Anne-Gaboury, MB
3e
Sonya Makarova
Centennial P.S., ON
4e
Sean Wang
Irwin Park Elementary, BC
5e
Ryan Torrington-smith
Castor Valley E.S., ON
6e
Jasper Liang
Marlborough Elementary, BC
7e
Jeffrey Dawson
8e
Sandra Nguyen
Homelands Senior P.S., ON
9e
Sumyung Jang
George Street M.S., NB
10e
David Lu
Homelands Senior P.S., ON

Résultats Détaillés

### Top 10

1er
Jesse Li
Sir Wilfrid Laurier Elementary, BC
2e
Aileen Zhang
Kwayhquitlum M.S., BC
3e
Michelle Liu
Marlborough Elementary, BC
4e
Catherine Yang
Marlborough Elementary, BC
5e
William Wang
École élémentaire publique Kanata, ON
6e
Kenneth Jiang
Bedford South School, NS
7e
Boya Yang
Marlborough Elementary, BC
8e
Max Jiang
Bedford South School, NS
9e
Saranya Varakunan
Three Valleys P.S., ON
10e
Eric Leroux
D. Aubrey Moodie E.S., ON

Résultats Détaillés

### Top 10

1er
Neel Nair
Three Valleys P.S., ON
2e
Tobey Sherrin
Ryerson P.S., ON
3e
Fuyang Deng
Winston Churchill P.S., ON
4e
Ethan Eastwood
Halifax Public Library, NS
5e
Raeed Zafar
Thamesville Area Central E.S., ON
6e
Kaitlyn Pereira
Laurelwood P.S., ON
7e
Fan Yang
Barrhaven P.S., ON
8e
Cristian B
Laurelwood P.S., ON
9e
Daniel P
Laurelwood P.S., ON
10e
Philip Seong
Marlborough Elementary, BC

Résultats Détaillés