CMKC 2023 Math Kangaroo Grade 3-4 Practice Flashcards

A set of practice flashcards derived from the 2023 Canadian Math Kangaroo Contest for Grades 3 and 4, covering logical reasoning, arithmetic, and spatial geometry questions.

In Problem 1, how many identical candles did Akira light at the same time?

Akira lit $5$ identical candles.

According to Problem 2, what equation is used to find the value of the two identical kangaroo coins?

$$20 + 10 + 10 + ? + ? + 1 = 51$$

What object is placed on a clock-face and turned around its center in Problem 3?

A dark gray disc with two holes.

How many puzzle pieces does Alice have in Problem 4 to form a square?

Alice has four puzzle pieces labeled $1$, $2$, $3$, and $4$.

In Problem 5, up to what number does Holger fill the empty cells of the table?

Holger fills the table using the numbers up to $50$.

What action does Kristoffer perform with the transparent paper in Problem 6?

Kristoffer folds the transparent paper along a dashed line.

In Problem 7, what is the rule for building Anna's tower of three ($3$) discs?

Every disc must be smaller than the disc immediately below it.

According to Problem 10, what are the specific masses of Rossitza's six weights?

The weights are $1, 2, 3, 4, 5$, and $6\,kg$.

In Problem 11, what information is known about the panther's hat color?

The panther's hat is not yellow, not red, and not blue.

What specific rule is given about the fox's and tiger's hats in Problem 11?

The fox's hat and the tiger's hat are not yellow.

In Problem 13, how many houses are located north and south of Road A?

There are $7$ houses north of Road A and $5$ houses south of Road A.

How many houses are located east of Road B in Problem 13?

$8$ houses are east of Road B.

In Problem 14, what is the sequence of the six Metro line stations?

The stations are $A, B, C, D, E$, and $F$.

What starting station and first stop are mentioned for the train driver in Problem 14?

The driver started at station $B$ and the first stop was station $C$.

In Problem 16, how many total coins would Zachary collect along PATH1 and PATH2?

Zachary would collect $32$ coins along PATH1 and $31$ coins along PATH2.

In Problem 17, how many beavers and kangaroos are standing in a line?

There are six ($6$) beavers and two ($2$) kangaroos.

According to Problem 17, what is the distribution of kangaroos in the line?

Amongst any $3$ consecutively numbered animals, exactly $1$ is a kangaroo.

What length of ruler does Ali have in Problem 18, and what lengths can he measure using it only once?

Ali has a $60\,cm$ ruler and can measure lengths of $10, 20, 30, 40, 50$, and $60\,cm$.

In Problem 19, what does machine R do to a square sheet of paper?

Machine R turns the paper $90^{\circ}$ clockwise.

What is the function of machine S in Problem 19?

Machine S stamps the paper with a star shape.

In Problem 21, what are the specific entry rules for Hermione, Harry, and Ron?

Hermione is never first, Harry is never second, and Ron is never third.

In Problem 22, what is the status of the five clocks on the wall?

One clock is an hour fast, one is an hour slow, one shows the correct time, and two have stopped.

According to Problem 23, how many total people live in the neighborhood's six houses?

A total of $18$ people live in the six houses.

In Problem 23, what are the population totals for the three different streets of three houses?

The totals are $9$, $10$, and $11$ people.

In Problem 24, what is the constraint when placing a shape over the square grid?

The shape can be rotated, but it cannot be flipped.