Number, NAPX-p110532v01

Question

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Worked Solution

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Variant 0

DifficultyLevel

389

Question

Leo puts $15 into his piggy bank to start saving money.

He then puts the same amount into the piggy bank at the end of each month.

The total amount of money in his piggy bank at the end of each month will be which of the following:

Worked Solution

Starting amount = $15 (odd)

End of 1st month = 15 + 15 = $30 (even)

End of 2nd month = 30 + 15 = $45 (odd)

∴\therefore Total amount will be either an odd or even number.

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
question
Leo puts $15 into his piggy bank to start saving money. He then puts the same amount into the piggy bank at the end of each month. The total amount of money in his piggy bank at the end of each month will be which of the following:
workedSolution
Starting amount = $15 (odd) End of 1st month = 15 + 15 = $30 (even) End of 2nd month = 30 + 15 = $45 (odd) $\therefore$ Total amount will be either an odd or even number.
correctAnswer
Sometimes odd sometimes even

Answers

Is Correct?Answer
x

Always an even number

x

Always an odd number

✓

Sometimes odd sometimes even

x

None of the above

Variant 1

DifficultyLevel

405

Question

Ana recycles 3 kilograms of plastic bottles in her first week of recycling.

She then recycles twice as much as she recycled the previous week for the next 5 weeks.

The total weight, in kilograms, of the plastic bottles she recycles in any given week will be which of the following:

Worked Solution

1st week: 3 kg (odd)

2nd week: 3 + 6 = 9 kg (odd)

3rd week: 9 + 18 = 27 kg (odd)

Any week: odd + even = odd

∴ Total amount will be always an odd number.

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
question
Ana recycles 3 kilograms of plastic bottles in her first week of recycling. She then recycles twice as much as she recycled the previous week for the next 5 weeks. The total weight, in kilograms, of the plastic bottles she recycles in any given week will be which of the following:
workedSolution
1st week: 3 kg (odd) 2nd week: 3 + 6 = 9 kg (odd) 3rd week: 9 + 18 = 27 kg (odd) Any week: odd + even = odd ∴ Total amount will be always an odd number.
correctAnswer
always odd

Answers

Is Correct?Answer
x

always even

✓

always odd

x

sometimes even or sometimes odd

x

none of the above

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