20283

Question

Camilla has only 10-cent, 20-cent and 50-cent coins in her purse.

She buys a coffee that costs her $3.80 and pays the exact price.

What is the smallest number of coins she could use to pay for her coffee?

Worked Solution

The minimum number of coins are:
7 ×\times 50-cent = $3.50
1 ×\times 20-cent = $0.20
1 ×\times 10-cent = $0.10


∴\therefore Minimum coins to make $3.80 = {{{correctAnswer}}} coins

Variant 0

DifficultyLevel

581

Question

Camilla has only 10-cent, 20-cent and 50-cent coins in her purse.

She buys a coffee that costs her $3.80 and pays the exact price.

What is the smallest number of coins she could use to pay for her coffee?

Worked Solution

The minimum number of coins are:
7 ×\times 50-cent = $3.50
1 ×\times 20-cent = $0.20
1 ×\times 10-cent = $0.10


∴\therefore Minimum coins to make $3.80 = 9 coins

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
correctAnswer
9

Answers

Is Correct?Answer
x

7

x

8

✓

9

x

11