Event 1: Mystery
- Next year Xavier will be three times as old as his
sister Yvonne, and two years after that he will be twice
as old as Yvonne.
How old is Xavier?
- Jackie has 12 coins, all quarters and nickels.
After trying to empty her pockets by
spending half her money on vending machine snacks,
she still has 12 coins, all quarters and nickels.
What is the largest amount of money Jackie could have spent?
- Given a set of points on a plane, an ordinary line
is a line that passes through exactly two of the points
but cannot be extended to pass through any of the others.
What is the largest number of points that can be arranged on
a plane so that only three ordinary lines can be drawn?
1. ____________ years
2. $ ____________
3. ____________ points
Event 2: Geometry
- Angles ABC and CBD are complementary. Angles CBD and DBE are supplementary.
What is the smallest possible measure of angle ABE?
- In the diagram below, AB is parallel to DE. What is x?
- How many degrees are between the minute hand and
the hour hand of an analog clock when it is 2:40 PM?
1. ____________ degrees
2. ____________ degrees
3. ____________ degrees
Event 3: Number Theory
- What is the largest prime number whose digits
add up to a multiple of three?
- The two digit number AB is prime, and the three digit
number AB5 is a divisible by 9 and 7.
What is AB?
- What is the sum of all the factors of 360?
1. ____________
2. ____________
3. ____________
Event 4: Arithmetic
- Consider the set of numbers {1, 1, 2, 3, 5, 8, 13, 21}.
If A is the mean, B is the median, and C is the mode of the set,
then what is A - B - C?
- Evalutate the following:
658 − 8 × 656 |
429 · 314 · 4 |
- What single number could be added to the set in problem #1 that would
make the the answer of (A - B - C) be equal to 2? (There are two answers.
Try finding both.)
1. ____________
2. ____________
3. ____________