Explanation:
Times means multiply. Therefore 3100 x 3 = 9300 grams.
9300 is not one of the choices, so we need to change 9300 grams to kilograms.
The fact that 1000 grams = 1 kilogram, means 9300 grams = 9.3 kilograms.
Explanation:
Fifteen tonnes per minute is the rate.
To find the number of minutes it takes to receive 120 tonnes, we divide 120 by 15.
120 ÷ 15 = 8
Explanation:
One billion is one thousand million or 1 000 000 000.
So, therefore, one billionth is one over a billion.
Explanation:
The fuel tank is ¾ full. The motorist has to add fuel to the remaining ¼ of a tank.
The motorist adds 12 litres of fuel to fill the remaining ¼ of a tank.
This means ½ a fuel tank is worth 24 litres, so a full tank must be 48 litres.
Explanation:
1 cm:2 km means 1 cm:200 000 cm as there are 100,000 centimetres in a kilometre.
Explanation:
If Tina is t years old, then Lisa must be t + 6, not 6t (this is times).
Now add the ages together t + t + 6 = 2t + 6.
2t + 6 = 26
Explanation:
The mean is found by adding all scores and dividing by the number of scores.
The five scores add to 305. Hence the mean is 61 ($305 ÷ 5 = $61).
Explanation:
The probability of an event happening is: What you want divided by the total number of outcomes.
In the jar, there are eight red, three orange, and nine purple marbles. The total number of marbles is 20.
Eli wants an orange or purple marble, of which there are 12.
Explanation:
Studying the columns closely, we notice Sam has scored 18 goals.
Six less than 18 is 12 (18 – 6). So, we need the column showing 12 goals.
By observation, we notice that Fred is the player that has scored 12 goals.
Explanation:
Adding all four amounts together will give Vera a total of $417 185.
Rounding to the nearest thousand means:
We go up to the next thousand if the number in the hundreds place is five or more.
Because the number in the hundreds place is one, we leave the thousands number (7) as it is.
Explanation:
There are 900 car bays in the car park.
Section two has 240 car bays (half of 480).
Section three will equal 900 – 480 – 240 = 180 car bays.
