September puzzle answers
Lots of winners in last month's Math Mania
The 2006-2007 Math Mania got off to a good
start in September. And there were 27 kids who got all of
the answers correct.
Usually, Young Saint Louis.com limits the number
of $10 Border's book certificates to two each month. But,
because there were so many winners in September, we're awarding
3 certificates.
In a random drawing from among the 27 winners, YSL.com
awarded certificates to:
Sydney Wright, 12, Scott Burns, 11,
and Jackie Migneco, 13, all of St. Louis.
Virtually all of the entrants got the first two questions
correct.
For Questions 3 and 4, all the kids who figured the middle
numbers in the two X-designs had to be 1 and 7 were on the
right track. The difference of 6 indicates the difference
in the two puzzle totals: 23 + 23 (or 46) and 26 + 26 (or
52) although you use the same 10 numbers in each puzzle.
About the only kids who didn't get Question 5 correct, where
those that forgot one of the rules. Ms. Math Mania,
Ms. Amy Ruzicka, said that the zero couldn't be used in the
100s column.
Congratulations to those with all correct answers. And we
urge you to enter again in October and invite your friends
to enter also.
September Math Mania Challenge: Number
Teasers
1. Place the numbers 1-9
in the nine circles below so that the sum of each side
of the triangle is 20. The 8 has been placed for you.
2. Place the numbers 1-9 in the nine circles
below so that the sum of each side of the triangle is
20. The 3 has been placed for you.
3. Place the numbers from 1-9 in the nine
circles below making the sum of each of the two columns
23.
4. Place the numbers from 1-9 in the nine
circles below making the sum of each of the two columns
26.
5. Place the numbers from 0-8 in the nine
circles below so that the sum of the three-digit numbers
formed will be 999. You may not place a 0 in the hundreds
place.
