Alan Parr

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• Alan Parr

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Pairs to 10

• Can you arrange your cards into five pairs, so
  that the digits in each pair add up to 10?
• Be prepared to explain!

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Your own total

• Can you arrange your cards into five pairs, so
  that the digits in each pair all add up to the
  same total?
• You can choose your target total for yourself.
• Be prepared to explain how you did it.

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Carl Friedrich Gauss

• born 30 April 1777
• died 23 February 1855

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• 1 2 3 4 5 6 7
• 8 9 10 11 12

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• 1 2 3 4 5 6 7
• 8 9 10 11 12
• 47 48 49
• 50

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• 1 2 3 4 5 6 7
• 8 9 10 11 12
• 47 48 49
• 50
• 97 98
• 99 100

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• 1 2 3 4
• 997 998 999 1000

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1001
1 1000
10

• 1 2 3 4
• 997 998 999 1000

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• 1 2 3 4
• 997 998 999 1000

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1001
1001
1001
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1001
1001
1001
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500 x 1001 ?
500 x 1 500 000
500 x 1000 500 000
500 x 1000 500 000
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500 x 1001 ?
500 x 1000 500 000
500 x 1001 500 500 000
500 x 1000 500 500
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Outlines

• Using only the cards from 1 to 5 from your set,
  arrange them in a V so that the three cards in
  each arm add up to the same total.

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Stand

• Start with 5
• add 2
• add 3
• add 2
• add 5
• subtract 4

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Choose a number

• Choose a number from 0 to 9 (and keep it secret!)
• add 2
• add 3 more
• subtract 1
• add 4

• add 10
• add the number you started with
• find half
• subtract the number you started with
• Remember what you get!

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