MAthematics At Work 11 Numerial Reasoning
Specific Curriculum Outcomes
N01 Students will be expected to analyze puzzles and games that involve numerical reasoning, using problemsolving strategies.
N01 Students will be expected to analyze puzzles and games that involve numerical reasoning, using problemsolving strategies.
Activities
 Sticks (aka Chopsticks)  This game has simple rules and needs no equipment. Everyone starts with one finger out on each hand. The players take turns tapping hands. The number of fingers out on your hand is the number of fingers that the other player must put out on the hand that you tapped. So, if your opponent taps your hand with three fingers out on their hand and you have one finger out, you add three fingers for a total of four fingers out. If after being tapped your total is over 5, put out the number of fingers past 5. (Example: You have three fingers out. Your opponent taps that hand with three fingers. You now have 1 finger out. (3 + 3 = 6, 6 is 1 past 5.)) If you end up with exactly five fingers out on one hand, that hand is “out.” You win by getting both of your opponent’s hands out! There are lots of variations of this game and you can play in a circle with multiple people.
 NimLike Games from NRICH  This is a collection of games of skill for two players, both players have exactly the same information, chance plays no part, and each game must terminate. There is always a 'winning strategy' and all the moves can be analysed mathematically. Can you find the winning strategies? Nim was the Immunity Challenge on "The Power of One", the sixth episode of Survivor Thailand. The challenge was called "Thai 21". There were 21 flags placed in a circle. Alternating turns, the tribes were allowed to gather one, two, or three flags at a time. The goal was to be the tribe to get the last remaining flag. The tribe to get that flag would win immunity. A great clip to play for your class if you can find it online.
 Go Low or Go Home from Dan Meyer  Each student chooses a whole number. If your number is chosen by someone else that number is out. Lowest number wins. Tally the results, award winners, show distributions, and talk strategy.
 Sudoku Printables by Krazydad  Thousands of free Sudoku puzzles to print. Each booklet of printable Sudoku contains eight puzzles, instructions, hints and answers.
 Primary Krypto from NCTM Illuminations  Krypto is an old Parker Brothers card game. The rules of Krypto are simple: Combine five number cards using the four arithmetic operations (+, –, ×, ÷) to arrive at a "target" number. This online version of Primary Krypto uses the numbers 1–10 only. The card game had both single digit numbers and two digit numbers up to 25.
 24 Game  24 is played with an ordinary deck of playing cards with all the face cards removed. The aces are taken to have the value 1 and the basic game proceeds by having 4 cards thrown and the first player that can achieve the number 24 exactly using only allowed operations (such as addition, subtraction, multiplication, division, and parentheses) wins the hand. For short games of 24, once a hand is won, the cards go to the player that won. If everyone gives up, the cards are shuffled back into the deck. The game ends when the deck is exhausted, and the player with the most cards wins.
 Inky Puzzles from Krazydad  Hundreds of free Inky puzzles suitable for printing. Inkies have the same rules as KenKen® the puzzles created by Tetsuya Miyamoto. Each Inky puzzle has only one unique solution.
 Daily HexaTrex Puzzle from Nucleus Learning  The object of the puzzle is to find the equation pathway that leads through ALL the tiles. The puzzle rules are easy to learn.


 Math Dice from Thinkfun  Roll the two 12sided target dice and multiply them to get a target number. Roll the three scoring dice and combine these numbers using addition, subtraction, multiplication, division, or even powers to build an equation that is closest, or equal to, the target. This mental challenge helps players sharpen math skills by solving problems in a fun new way.