Aussie Maths & Science Teachers: Save your time with SmarterEd
A kayak can be hired for different numbers of hours, as shown in the table below.
Select the answer that shows how to calculate the cost of hiring a kayak.
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number of hours multiplied by $30 |
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$10 for every hour plus an extra $30 |
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number of hours multiplied by $10 |
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$10 for every hour plus an extra $20 |
A biscuit factory produces 72 000 packets of biscuits in a year.
Production is expected to increase by 1500 packets each year.
Which of these will give the best estimate of the production of the biscuit factory in 3 years' time?
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`72\ 000 + 1500 xx 3` |
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`(72\ 000 + 1500) xx 3` |
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`72\ 000 + 1500 + 3` |
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`(72\ 000 + 3) xx 1500` |
In a set of five consecutive whole numbers, the largest number is given the value `h`.
The smallest number in the set has a value of
| `h + 4` | `5 - h` | `h - 5` | `h - 4` |
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Richard is ascending in a hot air balloon.
The temperature drops by the same amount every 50 metres that Richard ascends.
At ground level the temperature is 31°C.
At a height of 600 metres, the temperature is –5°C.
What is the air temperature at a height of 200 metres?
| `text(16°C)` | `text(18°C)` | `text(19°C)` | `text(22°C)` |
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Australia Post use formulas to calculate the cost of boxes sent in the post to local destinations.
They calculate the size of the box by the formula:
size = width + height + length
The minimum postage applies to boxes with a size of 110 cm or less.
Which box below is oversized?
| Length (cm) | Height (cm) | Width (cm) | |
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40 | 40 | 20 |
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60 | 10 | 45 |
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50 | 20 | 40 |
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40 | 40 | 30 |
Zoe collected 8 baskets of eggs from her chicken coup.
Each basket had the same number of eggs and a total of 96 eggs were collected.
Which equation shows the average number of eggs, `x`, in each basket?
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`x = 96 xx 8` |
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`x = 96 - 8` |
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`x ÷ 8 = 96` |
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`x xx 8 = 96` |
Aaron has $3 less than Brendon.
Using `a` for Aaron's money and `b` for Brendon's money, which equation correctly describes this fact?
| `a = b + 3` | `a = 3 - b` | `a = b - 3` | `a = b ÷ 3` |
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Package Delivery Pty Ltd charges the following for delivering a package with mass `x` kg
`text(Price) = 9 + 4.5x`
What is the mass, in kg, of a package that costs $90 to deliver?
| `10` | `18` | `20` | `22` |
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Ryan and Oliver are buying goldfish for their fish tank.
Oliver buys 3 times the number of goldfish as Ryan does, plus another 5.
Let `m` be the number of goldfish that Ryan buys.
Which expression represents the number of goldfish Oliver buys?
| `(3 xx m) + 5` | `3 + (5 xx m)` | `(m ÷ 3) - 5` | `3 - (m ÷ 5)` |
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Ali joins a gym that has a fortnightly fee of $33.
Members pay an extra $12 per session if they want to do a special yoga class.
Which expression represents Ali's fortnightly gym bill if she does `x` yoga classes during the fortnight?
| `12x` | `33x` | `33x + 12` | `33 + 12x` |
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