educational materials

darani · Posted: September 27 2008 Post subject:

A number with six repeating digits is always divisible by 3, 7, 11, and 13.

111,111 / 3 = 37,037

111,111 / 7 = 15,873

111,111 / 11 = 10,101

111,111 / 13 = 8,547

darani · Posted: September 27 2008 Post subject:

999,999 * 1 = 0,999,999
999,999 * 2 = 1,999,998
999,999 * 3 = 2,999,997
999,999 * 4 = 3,999,996
999,999 * 5 = 4,999,995
999,999 * 6 = 5,999,994
999,999 * 7 = 6,999,993
999,999 * 8 = 7,999,992
999,999 * 9 = 8,999,991
999,999 * 10 = 9,999,990

darani · Posted: September 27 2008 Post subject:

9 * 9 = 81
99 * 99 = 9,801
999 * 999 = 998,001
9,999 * 9,999 = 99,980,001
99,999 * 99,999 = 9,999,800,001
999,999 * 999,999 = 999,998,000,001
9,999,999 * 9,999,999 = 99,999,980,000,001

darani · Posted: September 27 2008 Post subject:

81,274,365 * 9 = 731,469,285
72,645,831 * 9 = 653,812,479
58,132,764 * 9 = 523,194,876
76,125,483 * 9 = 685,129,347

darani · Posted: September 27 2008 Post subject:

81 = (8 + 1)^2 = 9^2

^ -> means power

darani · Posted: September 27 2008 Post subject:

4,913 = (4 + 9 + 1 + 3)^3 = 17^3

^ -> means power

sunnyajmal · V I P Joined: 18 Feb 2008 Posts: 8649 Location: Hearts

thanks for the useful posts bro...

darani · Posted: September 27 2008 Post subject:

A small table of wonder for u all.....

darani · Posted: September 27 2008 Post subject:

135 = 1^1 + 3^2 + 5^3

175 = 1^1 + 7^2 + 5^3

518 = 5^1 + 1^2 + 8^3

598 = 5^1 + 9^2 + 8^3

darani · Posted: September 27 2008 Post subject:

1,306 = 1^1 + 3^2 + 0^3 + 6^4

1,676 = 1^1 + 6^2 + 7^3 + 6^4

2,427 = 2^1 + 4^2 + 2^3 + 7^4

^ -> means power

darani · Posted: September 27 2008 Post subject:

3,435 = 3^3 + 4^4 + 3^3 + 5^5

438,579,088 = 4^4 + 3^3 + 8^8 + 5^5 + 7^7 + 9^9 + 0^0 + 8^8 + 8^8

^ -> means power

darani · Posted: September 27 2008 Post subject:

Another amusing table for u....

darani · Posted: September 27 2008 Post subject:

1 = 1!

2 = 2!

145 = 1! + 4! + 5!

40,585 = 4! + 0! + 5! + 8! + 5!

darani · Posted: September 27 2008 Post subject:

Amazing equality.......

darani · Posted: September 27 2008 Post subject:

Find the output your friend got....

1. Choose any three-digit number (where the units and hundreds digits
are not the same).

2. Reverse the digits of this number you have selected.

3. Subtract the two numbers (naturally, the larger minus the smaller).

4. Once again, reverse the digits of this difference.

5. Now, add your last two numbers.

The output after this calculation will always be 1,089.....

Now start betting ur frnds.....

educational materials

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