Puzzle #1 solution:
5 − 5 + 5 − 5 = 0
5 − 5 + 5 ÷5 = 1
5 ÷5 + 5 ÷5 = 1 + 1 = 2
5 × (5 − 5) + 5 = 5
Puzzle #2 solution:
5 − 5 + 5 − 5 = 0
5 − 5 + 5 ÷5 = 1
5 ÷5 + 5 ÷5 = 1 + 1 = 2
5 × (5 − 5) + 5 = 5
Puzzle #2 solution:
Puzzle #3 solution:
Puzzle #4:
The trick is to find out how much money you make in 30 days if you get 1 cent the first day, 2 cents the second day, 4 cents the third day, and so on... Day 1: 1 cents
Day 2: 2 cents
Day 3: 4 cents
Day 4: 8 cents
Day 5: 16 cents
Day 6: 32 cents
Day 7: 64 cents
Day 8: 128 cents
Day 9: 256 cents
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Keep mutliplying by 2
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Day 30: 536,870,912 cents
536,870,912 cents/100 = 5,368,709.12 dollars and 5,368,709.12 is bigger than 5,000,000
Therefore, you are better off taking 1 cent the first day, 2 cents the second day, 4 cents the third day, and so on... until the 30th day
Puzzle #5:
Answer = 30
The trick is to find out how much money you make in 30 days if you get 1 cent the first day, 2 cents the second day, 4 cents the third day, and so on... Day 1: 1 cents
Day 2: 2 cents
Day 3: 4 cents
Day 4: 8 cents
Day 5: 16 cents
Day 6: 32 cents
Day 7: 64 cents
Day 8: 128 cents
Day 9: 256 cents
-------
-------
-------
-------
Keep mutliplying by 2
-------
-------
-------
-------
Day 30: 536,870,912 cents
536,870,912 cents/100 = 5,368,709.12 dollars and 5,368,709.12 is bigger than 5,000,000
Therefore, you are better off taking 1 cent the first day, 2 cents the second day, 4 cents the third day, and so on... until the 30th day
Puzzle #5:
Answer = 30
Let's have some numbers fun on the computer and internet! Follow your teacher's instructions:
1.
http://www.memozor.com/memory-game-online-free/for-adults/difficult-memory/numbers2.
http://www.bbc.co.uk/skillswise/game/ma02symb-game-comparing-numbers
3.
http://www.mathiqgames.com/division-games/Cannon-Divisor.html
4.
http://www.mathiqgames.com/Quick-Arrows.html
5.
http://www.mathiqgames.com/arithmetic-games/Balloons.html
6.
http://www.mathiqgames.com/GeometryAngles.html
7.
http://www.mathplayground.com/spaceracer_multiplication.html
8.
http://www.mathplayground.com/ASB_Division_Derby.html
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