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GALACTIC EXCHANGE PRACTICE PROBLEMS
SOLUTIONS

PLANET 1

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

1 TRIANGLE

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The SQUARE is worth the least. It takes 2 SQUARES to equal one circle and 7 SQUARES to equal one triangle.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 7 SQUARES to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: TRIANGLE, 2 CIRCLES
Least valuable: 11 SQUARES

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.

6. What is the fewest number and types of coins needed to purchase a package of Mushniks using exact change?

2 TRIANGLES AND 1 SQUARE

PLANET 2

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

3 SQUARES

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The SQUARE is worth the least. It takes 7 SQUARES to equal one circle and 11 SQUARES to equal one triangle.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 3 SQUARES to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: 2 CIRCLES, 1 SQUARE
Least valuable: 15 SQUARES

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.

6. What is the fewest number and types of coins needed to purchase a package of Mushniks using exact change?

2 TRIANGLES

PLANET 3

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

1 SQUARE AND 1 CIRCLE

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The SQUARE is worth the least. It takes 8 SQUARES to equal one circle and 3 SQUARES to equal one triangle.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 9 SQUARES to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: 1 SQUARE, 1 CIRCLE, 1 TRIANGLE.
Least valuable: 12 SQUARES

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.

6. What is the fewest number and types of coins needed to purchase a package of Mushniks using exact change?

2 CIRCLES AND 1 SQUARE.

PLANET 4

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

1 SQUARE AND 1 TRIANGLE

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The SQUARE is worth the least. It takes 5 SQUARES to equal one circle and 3 SQUARES to equal one triangle.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 4 SQUARES to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: (2 TRIANGLES + 1 SQUARE) OR (1 CIRCLE AND 2 SQUARES)
Least valuable: 7 SQUARES

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.

6. What is the fewest number and types of coins needed to purchase a package of Mushniks using exact change?

(3 TRIANGLES) OR (1 SQUARE, 1 CIRCLE + 1 TRIANGLE)

PLANET 5

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

1 SQUARE AND 1 TRIANGLE

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The CIRCLE is worth the least. It takes 3 CIRCLES to equal one SQUARE and 2 CIRCLES to equal one triangle.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 5 CIRCLES to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: (1 SQUARE + 2 TRIANGLES) OR (2 SQUARES + 1 CIRCLE)
Least valuable: 7 CIRCLES

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.

6. What is the fewest number and types of coins needed to purchase a package of Mushniks using exact change?

1 TRIANGLES AND 2 SQUARES

PLANET 6

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

2 SQUARES

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The CIRCLE is worth the least. It takes 4 CIRLCES to equal one SQUARE and 3 CIRCLES to equal one triangle.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 8 CIRCLES to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: 1 SQURE AND 2 TRIANGLES
Least valuable: 10 CIRCLES.

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.

6. What is the fewest number and types of coins needed to purchase a package of Mushniks using exact change?

(6 SQUARES AND 1 TRIANGLE) OR (4 SQUARES AND 3 TRIANGLES)

PLANET 7

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

1 TRIANGLE

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The CIRCLE is worth the least. It takes 9 CIRCLES to equal one SQUARE and 7 CIRCLES to equal one triangle.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 7 CIRCLES to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: 1 SQUARE AND 2 CIRCLES
Least valuable: 11 CIRCLES.

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.

6. What is the fewest number and types of coins needed to purchase a package of Mushniks using exact change?

2 TRIANGLES AND 1 CIRCLE

PLANET 8

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

1 SQUARE AND 2 TRIANGLES

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The TRIANGLE is worth the least. It takes 5 TRIANGLES to equal one circle and 7 TRIANGLES to equal one SQUARE.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 7 TRIANGLES to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: 1 SQUARE AND 1 CIRCLE.
Least valuable: 12 TRIANGLES.

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.

6. What is the fewest number and types of coins needed to purchase a package of Mushniks using exact change?

(2 SQUARES AND 3 TRIANGLES) OR (3 CIRCLES AND 2 TRIANGLES).

PLANET 9

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

1 SQUARE AND 1 TRIANGLE

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The TRIANGLE is worth the least. It takes 5 TRIANGLES to equal one circle and 11 TRIANGLES to equal one SQUARE.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 12 TRIANGLES to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: 1 SQUARE AND 1 CIRCLE.
Least valuable: 16 TRIANGLES.

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.

6. What is the fewest number and types of coins needed to purchase a package of Mushniks using exact change?

2 SQUARES AND 1 TRIANGLE.

PLANET 10

1. Buy a package of Zoogs. What is the fewest number of coins needed to purchase a package of zoogs using exact change? Make sure you list types of coins as well.

1 TRIANGLE

2. Which coin is worth the least and how many does it take to equal each of the other coins?

The TRIANGLE is worth the least. It takes 11 TRIANGLES to equal one circle and 8 TRIANGLES to equal one SQUARE.

3. How many of the least valuable coins would it take to buy a package of zoogs?

It takes 1 TRIANGLE to buy a package of zoogs.

4. Buy a package of Glorps. What is the fewest number of coins needed to purchase a package of Glorps using exact change? (Include the types of coins in your answer.) How many of the least valuable coins would it take to buy a package of Glorps?

Exact change: 1 CIRCLE AND 2 TRIANGLES
Least valuable: 13 TRIANGLES.

5. Another Earthling arrives on the next shuttle and wants to try some Mushniks. Explain how you figured out the relationship between each coin.