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  • Mathematics
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The click in the creek recording

Mara had promised the local library a recording called Morning at Bellbird Creek. The library was building a small exhibition about places people passed every day without really noticing. Mara liked the idea of capturing the creek before the walking track became busy, so she borrowed a microphone and arrived just after sunrise.

At first, the recording seemed perfect. Water pressed softly around the stones. A magpie called from somewhere beyond the paperbarks. Even the distant traffic sounded more like the sea than a road. Then came a dry, regular click.

Mara stopped the recording and checked the cable. She started again. Eleven seconds later: click. She moved farther along the bank, but the sound followed her. By the fourth attempt, she was less interested in the creek than in whatever kept spoiling it.

Around the bend, she found an old green wheelbarrow. One wheel clicked whenever it turned. Its owner, a volunteer named Theo, was using it to collect drink cans, food wrappers and lengths of fishing line left near the reeds.

“Could you take the other path for a few minutes?” Mara asked. She held up the microphone. “I’m trying to record the creek.”

Theo looked at the wheelbarrow, then at the full rubbish bag inside it. “I’ll be finished soon,” he said. He did not sound annoyed, which somehow made Mara feel less reasonable.

She waited with the recorder switched off. Theo pulled a loop of fishing line from a low branch, wound it around a piece of cardboard and checked the mud beneath it for anything caught. Near the footbridge, he separated a plastic ring from a clump of wet leaves. Each time he moved, the wheel clicked.

When Theo finally disappeared up the track, Mara recorded the creek again. This version was clean, but it felt oddly flat. Listening through her headphones, she could hear water, birds and wind. She could not hear the work that allowed the place to sound untouched.

Mara ran after Theo and asked whether she could record one more trip. In the finished exhibition, her track began with the creek alone. After half a minute, the clicking wheel entered, followed by the faint scrape of the litter picker and then the creek again. She called the piece Morning at Bellbird Creek, just as planned. Under the title she added one sentence: “Some of the sounds that interrupt a place are also the sounds of someone caring for it.”

On opening day, most visitors listened for only a few seconds. A boy in a yellow raincoat stayed until the end. He lifted one side of the headphones and said to his father, “That clicking means someone is looking after it.”

Mara smiled. The sound she had tried hardest to remove had become the part that helped someone notice.

Humanities

Question 1

What first caused Mara to stop her recording?

Answers and explanations appear after this group.

  1. The walking track became crowded.
  2. A regular clicking sound entered the recording.
  3. Theo asked her to move.
  4. The recorder battery ran out.

Humanities

Question 2

Why does Mara feel ‘less reasonable’ after Theo answers her?

Answers and explanations appear after this group.

  1. His calm reply makes her reconsider whether her request is fair.
  2. She realises that she misunderstood his short reply.
  3. She regrets stopping him because he will finish soon.
  4. His glance at the rubbish bag makes her want to help him.

Humanities

Question 3

The recording is described as ‘clean, but it felt oddly flat’. What does this suggest?

Answers and explanations appear after this group.

  1. The equipment could not record a wide enough range of sounds.
  2. The recording was clear but left out something important.
  3. Mara had become bored with the sound of the creek.
  4. The creek was too quiet for visitors to recognise.

Humanities

Question 4

Which statement best describes how Mara’s view of the clicking changes?

Answers and explanations appear after this group.

  1. She tries to remove it, then keeps it because she cannot find a quiet location.
  2. She sees it as a problem, then uses it to explain why the exhibition was delayed.
  3. She first hears interference, then recognises evidence of care for the creek.
  4. She first ignores it, then decides it should replace the natural creek sounds.

Humanities

Question 5

Which detail best supports the idea that Theo works carefully and thoroughly?

Answers and explanations appear after this group.

  1. The rubbish bag in the wheelbarrow is full.
  2. Theo says that he will be finished soon.
  3. One wheel of the wheelbarrow clicks as it turns.
  4. He checks the mud beneath the fishing line for anything caught.
Check answers
  1. Question 1

    What first caused Mara to stop her recording?

    A. The walking track became crowded.
    B. A regular clicking sound entered the recording. Correct answer
    C. Theo asked her to move.
    D. The recorder battery ran out.

    The passage says the recording initially seemed perfect, then a dry, regular click appeared and Mara stopped. The other events are not given as the reason for stopping.

  2. Question 2

    Why does Mara feel ‘less reasonable’ after Theo answers her?

    A. His calm reply makes her reconsider whether her request is fair. Correct answer
    B. She realises that she misunderstood his short reply.
    C. She regrets stopping him because he will finish soon.
    D. His glance at the rubbish bag makes her want to help him.

    Theo answers calmly while doing useful work. Because he is not annoyed, Mara reconsiders whether asking him to move for her recording was fair.

  3. Question 3

    The recording is described as ‘clean, but it felt oddly flat’. What does this suggest?

    A. The equipment could not record a wide enough range of sounds.
    B. The recording was clear but left out something important. Correct answer
    C. Mara had become bored with the sound of the creek.
    D. The creek was too quiet for visitors to recognise.

    The clean recording contains water, birds and wind, but it leaves out Theo’s work and the meaning Mara now connects with the place. It is technically clear but less complete in significance.

  4. Question 4

    Which statement best describes how Mara’s view of the clicking changes?

    A. She tries to remove it, then keeps it because she cannot find a quiet location.
    B. She sees it as a problem, then uses it to explain why the exhibition was delayed.
    C. She first hears interference, then recognises evidence of care for the creek. Correct answer
    D. She first ignores it, then decides it should replace the natural creek sounds.

    Mara initially treats the click as interference that spoils the recording. After watching Theo, she understands it as evidence of the care that helps the creek seem untouched.

  5. Question 5

    Which detail best supports the idea that Theo works carefully and thoroughly?

    A. The rubbish bag in the wheelbarrow is full.
    B. Theo says that he will be finished soon.
    C. One wheel of the wheelbarrow clicks as it turns.
    D. He checks the mud beneath the fishing line for anything caught. Correct answer

    Checking the mud beneath the removed fishing line shows that Theo looks beyond the obvious rubbish and makes sure nothing has been caught. That is the strongest evidence of careful, thorough work.

Mathematics

Question 6

At a ferry terminal, a display number is calculated by multiplying the number of waiting cars by 4, then subtracting the number of empty spaces on the next ferry.

At one moment, the display shows 66 and there are 6 empty spaces. How many cars are waiting?

  1. 15
  2. 18
  3. 24
  4. 30
Show answer
B. 18 Correct answer

Add back the 6 empty spaces first: 66 + 6 = 72. The display rule multiplied the number of cars by 4, so 72 ÷ 4 = 18 cars.

Mathematics

Question 7

A water tank was 3/5 full. After 24 litres were added, it was 9/10 full. What is the tank's total capacity?

  1. 48 litres
  2. 60 litres
  3. 72 litres
  4. 80 litres
Show answer
D. 80 litres Correct answer

3/5 is 6/10. The added water changed the level from 6/10 to 9/10, an increase of 3/10. If 3/10 of the tank is 24 litres, then 1/10 is 8 litres and the whole tank is 10 × 8 = 80 litres.

Mathematics

Question 8

A tray contains more than 60 but fewer than 100 counters. Grouping them in sixes leaves 4 counters. Grouping them in sevens leaves 5 counters. How many counters are on the tray?

  1. 75
  2. 76
  3. 82
  4. 88
Need a hint?

List numbers in the range that satisfy one grouping condition, then test the other.

Show answer
C. 82 Correct answer

Between 60 and 100, numbers that leave 4 after division by 6 are 64, 70, 76, 82, 88 and 94. Only 82 also leaves 5 after division by 7: 82 = 7 × 11 + 5. It also equals 6 × 13 + 4.

Mathematics

Question 9

Three parcels are weighed in pairs. The three pair totals are 11.2 kg, 13.6 kg and 14.8 kg. What is the mass of the lightest parcel?

  1. 6.2 kg
  2. 8.6 kg
  3. 19.8 kg
  4. 5 kg
Need a hint?

How many times does each parcel appear if you add all three pair totals?

Show answer
D. 5 kg Correct answer

Adding the pair totals counts each parcel twice: 11.2 + 13.6 + 14.8 = 39.6 kg. All three parcels therefore weigh 19.8 kg. Subtract the largest pair total to find the lightest parcel: 19.8 − 14.8 = 5 kg. The other parcels weigh 6.2 kg and 8.6 kg, which reproduce all three pair totals.

Mathematics

Question 10

Two displays contain the same number of tiles. In the first, red tiles and blue tiles are in the ratio 2:3. In the second, red tiles and blue tiles are in the ratio 3:7. What fraction of the tiles in the two displays together are red?

  1. 1/3
  2. 7/20
  3. 2/5
  4. 3/10
Need a hint?

Imagine the same convenient total number of tiles in each display.

Show answer
B. 7/20 Correct answer

Use 10 tiles in each display as a convenient equal total. The first then has 4 red and 6 blue tiles; the second has 3 red and 7 blue. Together there are 7 red tiles out of 20, so the fraction is 7/20. The same fraction holds for any allowed equal display sizes.