the sum of all digits in the numbers 34,35,and 36 is 24 because (3+4)+(3+5)+(3+6)=24. Find the sum of all digits in the first twenty-five natural numbers:1,2,3,4,5,....,23,24,25

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- October 13th 2009, 07:23 PMronaldjsum of digits?
the sum of all digits in the numbers 34,35,and 36 is 24 because (3+4)+(3+5)+(3+6)=24. Find the sum of all digits in the first twenty-five natural numbers:1,2,3,4,5,....,23,24,25

- October 13th 2009, 09:18 PMWilmer
Add 'em up!

- October 13th 2009, 09:36 PMpacman
the sum of all digits in the numbers 34,35,and 36 is 24 because (3+4)+(3+5)+(3+6)=24. Find the sum of all digits in the first twenty-five natural numbers:1,2,3,4,5,....,23,24,25

1 + 2 + 3 = 6

4 + 5 + 6 = 15 = 6

7 + 8 + 9 = 24 = 6

10 + 11 + 12 = (1 + 0) + (1 + 1) + ( 1 + 2) = 6

13 + 14 + 15 = 4 + 5 + 6 = 15 = 6

16 + 17 + 18 = 7 + 8 + 9 = 24 = 6

19 + 20 + 21 = 10 + 2 + 3 = 15 = 6

22 + 23 + 24 = 4 + 5 + 6 = 15 = 6

25 = 7?

my pattern does not look beautiful as it is . . . . your hint? - October 14th 2009, 03:39 AMronaldj
Thank u!