MAGIC TRICKS "Number Card Magic"

Number Card Magic
Make 5 cards the same as these:


Card A 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31
Card B 2 3 6 7 10 11 14 15 18 19 22 23 26 27 30 31
Card C 4 5 6 7 12 13 14 15 20 21 22 23 28 29 30 31
Card D 8 9 10 11 12 13 14 15 24 25 26 27 28 29 30 31
Card E 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Get your friend to choose any number from the cards without telling you the number, but to tell you all the cards it appears on. You should be able to quickly say what number was chosen.

Superfast Addition
Get a friend to write down 2 numbers less than 20, one under the other without you seeing them. then your friend makes a third number by adding the first 2 together and write it below the first two. Then make a fourth number by adding the second and third, a fifth by adding the third and fourth, and so on, until there is a column of ten numbers. Now if you look at the numbers you can quickly give the total of the column. .

All you do is multiply the seventh number by 11, in the example below it is 142 x11.

Example 14+9+23+32+55+87+142+229+371+600 =1562

You can multiply by any number by 11 very quickly in your head - How? The secret is to multiply the number by 10 first and then add the number to the first result. For the example above - 10 x 142 = 1420 (the really easy bit - just add 0 to the end), then add 142 to 1420 which gives us the answer 1562 (even that bit’s not too difficult either!).