University of Waterloo Logo and CEMC Banner

2020 Beaver Computing Challenge
(Grade 5 & 6)

Questions


Part A

Bear Selection

Story

Ren is allowed to bring one of his four teddy bears to school.

The first bear wears glasses, a scarf and has a star. The second bear wears a bow. The third bear wears glasses, a bow, a scarf and has a star. The fourth bear wears a scarf and has a star.

Ren brings the bear that has a star on one of its feet, and is wearing a scarf or a bow, but not glasses.

Question

Which bear did Ren bring to school?

  1. The first bear wears glasses, a scarf and has a star.
  2. The second bear wears a bow.
  3. The third bear wears glasses, a bow, a scarf and has a star.
  4. The fourth bear wears a scarf and has a star.

Bowls

Story

Whenever a customer orders soup, a bowl is taken from the top of the stack shown.

A description of stack follows.

Question

What is the fewest number of soup orders that need to be filled so that three identical bowls are used?

  1. 13
  2. 14
  3. 15
  4. 16

Bird Watching

Story

A family went for a walk. They started from their home and walked along some paths, eventually returning home. They did not walk on any path more than once.

A description of the diagram follows.

During their walk they saw exactly four birds. Three of the four birds they saw are shown below:

The orange bird The red bird The yellow bird

Question

Which other bird must they have seen?

  1. The purple bird
  2. The blue bird
  3. The pink bird
  4. The green bird

Rare Mushrooms

Story

Colby wants to take a picture of a rare mushroom. To determine whether or not a mushroom is rare, Colby assigns points to the stem and cap according to the following tables:

Points for stem
Picture
Type of Stem Plain Layered
Points 0 2
Points for cap
Picture
Type of Cap Dotted Horned Striped
Points 1 3 4

A mushroom that scores 5 points or more is rare and a mushroom that scores less than 5 points is not rare.

Question

Which one of the following four mushrooms is rare?

  1. mushroom with plain stem and dotted cap
  2. mushroom with layered stem and horned cap
  3. mushroom with layered stem and dotted cap
  4. mushroom with plain stem and striped cap

Part B

Moving Packages

Story

A robotic arm takes packages from three conveyor belts (labelled A, B, and C) and moves them to the conveyor belt labelled OUT. The rules for the robotic arm are as follows:

If the robotic arm is ready to take a package from a particular belt, but no package is available there, the robotic arm will shut down.