Interesting Facts About Numbers

Interesting Facts About Numbers

Fact 1.
Do you know interesting facts from the numbers 142 857 ?
If you multiply the number with the numbers 1 to 6, the result is the numbers have only changed the places, but all the same order

142 857 * 1 = 142 857
142 857 * 2 = 285 714
142 857 * 3 = 428 571
142 857 * 4 = 571 428
142 857 * 5 = 714 285
142 857 * 6 = 857 142
and when you multiply with "7" then the result is 999 999.
also,
142 + 857 = 999,

14 + 28 + 57 = 99.
and,
142 857 * 142 857 = 20408122449.
20408 + 122449 = 142 857.

Fact 2.
11.111.111 x 111.111.111 = 12.345.678.987.654.321

Fact 3.
Try multiplying the number 37 with a 3-digit multiplier
3 * 37 = 111
6 * 37 = 222
9 * 37 = 333
12 * 37 = 444
15 * 37 = 555
18 * 37 = 666
21 * 37 = 777
24 * 37 = 888
27 * 37 = 999

Fact 4.
Trapeze #1:

1 * 9 + 2 = 11
12 * 9 + 3 = 111
123 * 9 + 4 = 1111
1234 * 9 + 5 = 11111
12345 * 9 + 6 = 111111
123456 * 9 + 7 = 1111111
1234567 * 9 + 8 = 11111111
12345678 * 9 + 9 = 111111111

Trapeze #2:

1 * 8 + 1 = 9
12 * 8 + 2 = 98
123 * 8 + 3 = 987
1234 * 8 + 4 = 9876
12345 * 8 + 5 = 98765
123456 * 8 + 6 = 987654
1234567 * 8 + 7 = 9876543
12345678 * 8 + 8 = 98765432
123456789 * 8 + 9 = 987654321

Trapeze #3:

0 * 9 + 8 = 8
9 * 9 + 7 = 88
98 * 9 + 6 = 888
987 * 9 + 5 = 8888
9876 * 9 + 4 = 88888
98765 * 9 + 3 = 888888
987654 * 9 + 2 = 8888888
9876543 * 9 + 1 = 88888888
98765432 * 9 + 0 = 888888888
987654321 * 9 - 1 = 8888888888
9876543210 * 9 - 2 = 88888888888

Fact 5.

123456789 * 0.9 = 11111111
123456789 * 1.8 = 22222222
123456789 * 2.7 = 33333333
123456789 * 3.6 = 44444444
123456789 * 4.5 = 55555555
123456789 * 5.4 = 66666666
123456789 * 6.3 = 77777777
123456789 * 7.2 = 88888888
123456789 * 8.1 = 99999999

Cool isn't it?