1A. 3, 4, 6, 8, 12, 14, 18, 20, ?
1B. 0, 3, 8, 15, 24, 35, 48, 63, 80, ?
1C. 10, 8, 6, 4, 2, 0, ?
Source: The Math League
http://www.mathleague.com
Remember that a RUNSUM of a number A is a sequence of numbers which
add up to A.
For example: 9 = 2 + 3 + 4 and 9 = 4 + 5.
3A. 27 has 3 different RUNSUMS. What are they?
3B. What is the smallest number with 3 different RUNSUMS?
3C. Can you find a number with 4 different RUNSUMS?
3D. What is the smallest number with 5 different RUNSUMS?
Source: The Math Forum
http://forum.swarthmore.edu/midpow/solutions/solution.ehtml?puzzle=19
Don Braffitt