Math Olympiad
Area/Perimeter
GCF
LCM
Riddles
100

If 82 + 18 + 83 + 17 + 84 + 16 + 85 + 15 + 71 + N= 500, what is the value of N? 

29

100

What is the area for a triangle?

A= (b x h) / 2

A= (l x w) / 2

100

What is the greatest common factor of 12 and 15?

3

100

What is the least common multiple of 3 and 7?

21

100

Kate's mother has three children: January, February, and ____? 

Kate!

200

Trini is 1 month older than Billy. Jason is 3 months older than Billy. Kimberly is 4 months older than Jason. Kimberly is how much older than Trini (in months)? 

6 months

200

Find the perimeter of a triangle with one side length 6ft, one side length 4ft, and one side length 9ft.

19 feet

200

What is the great common factor of 50, 35, and 15?

5

200

What is the least common multiple of 20 and 12?

60

200

I have a tail and a head, but no body. What am I?

A coin!

300

What number between 121 and 149 is exactly divisible by both 3 and 5?

135

300

Find the area of a triangle with base = 20 in and height = 30 in.

600 square inches

300

What is the greatest common factor of 64 and 80?

16

300

What is the least common multiple of 21 and 24?

168

300

How many months of the year have 28 days?

All of them!

400

Lee walks along the rectangle from point A to B to C to D, a distance of 38 meters. Marina walks along the rectangle from point B to C to D to A, a distance of 31 meters. What is the perimeter of the pool? 

46 meters

400

A square pizza box has an area of 196 square inches. What is the length of one side of the pizza box?

14 inches

400

Sarah is making bead necklaces. She has 60 blue beads and 72 green beads. What is the greatest number of identical necklaces she can make if she wants to use all the beads?

6 necklaces

400

The soccer team plays every 3 days and the basketball team plays every 5 days. In how many days will both teams have games on the same day again?

15 days

400

It belongs to you, but everyone else uses it more. What is it?

Your name!

500

Alexandra gives 1/2 of her marbles to Tyler, who gives 2/3 of what he receives to Jan, who gives 3/4 of what she receives to Jerry. If each has a whole number of marbles, what is the fewest number of marbles that Alexandra could have started with? 

12

500

Find the perimeter of a pentagon with side lengths that equal 8 in.

40 inches

500

Johnny baked 36 oatmeal cookies and 48 chocolate chip cookies to package in plastic containers for his friends. He wants to divide the cookies into identical containers so that each container has the same number of each kind of cookie. If he wants each container to have the greatest number of cookies possible, how many plastic containers does he need?

12 containers

500

Three pigs entered a race around a track. Piggly takes 12 minutes to run one lap. Piglet takes 6 minutes to run one lap, and it takes Wiggly 16 minutes to run one lap. If all three pigs begin the race at the same time, how many minutes will it take for all three pigs to be at the starting point again?

48 minutes

500

You’re running a race and at the very end, you pass the person in 2nd place. What place did you finish the race in?

2nd place :)