Chapter 7
Number tricks
What a card
What a card is a great number mind-reading trick which uses quite simple numbers to produce impressive results.
Suitable for
KS2
Aims
- To recognise numbers and their properties.
- To investigate how a number trick works.
Players
- Suitable for pairs, small groups or the whole class
Resources
- Pencil and paper
What to do
- Write the following rows of numbers on the board:
Line A 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 Line B 2 3 6 7 10 11 14 15 18 19 22 23 26 27 30 31 Line C 4 5 6 7 12 13 14 15 20 21 22 23 28 29 30 31 Line D 8 9 10 11 12 13 14 15 24 25 26 27 28 29 30 31 Line E 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 - Ask children to look at the numbers carefully. Now ask someone ...
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