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Another Trapeze:
1 x 8 + 1 = 9
12 x 8 + 2 = 98
123 x 8 + 3 = 987
1234 x 8 + 4 = 9876
12345 x 8 + 5 = 98765
123456 x 8 + 6 = 987654
1234567 x 8 + 7 = 9876543
12345678 x 8 + 8 = 98765432
123456789 x 8 + 9 = 987654321
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And another one:
0 x 9 + 8 = 8
9 x 9 + 7 = 88
98 x 9 + 6 = 888
987 x 9 + 5 = 8888
9876 x 9 + 4 = 88888
98765 x 9 + 3 = 888888
987654 x 9 + 2 = 8888888
9876543 x 9 + 1 = 88888888
98765432 x 9 + 0 = 888888888
987654321 x 9 - 1 = 8888888888
9876543210 x 9 - 2 = 88888888888
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987654321 x 09 = 08 888 888 889
987654321 x 18 = 17 777 777 778
987654321 x 27 = 26 666 666 667
987654321 x 36 = 35 555 555 556
987654321 x 45 = 44 444 444 445
987654321 x 54 = 53 333 333 334
987654321 x 63 = 62 222 222 223
987654321 x 72 = 71 111 111 112
987654321 x 81 = 80 000 000 001
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Nice one:
And finally, take a look at this symmetry:
1 x 1 = 1
11 x 11 = 121
111 x 111 = 12321
1111 x 1111 = 1234321
11111 x 11111 = 123454321
111111 x 111111 = 12345654321
1111111 x 1111111 = 1234567654321
11111111 x 11111111 = 123456787654321
111111111 x 111111111 = 12345678987654321
111.111.111 x 111.111.111 = 12.345.678.987.654.321
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This math trick will determine your birthday. Just follow the steps with a calculator and press equal after each step. Go ahead and try the trick
without cheating! For a simple, online JavaScript calculator, click on the calculator button.
- Add 18 to your birth month
- Multiply by 25
- Subtract 333
- Multiply by 8
- Subtract 554
- Divide by 2
- Add your birth date
- Multiply by 5
- Add 692
- Multiply by 20
- Add only the last two digits of your birth year
- Subtract 32940 to get your birthday!
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