SmartKidz

Amelia is thinking of a mathematical expression. When she substitutes a = 5 and b = 2 into her expression, the result is 40.

Which of the following could be Amelia's expression?

• • A. 4ab

• • B. 8a + 4b

• • C. b^2 + 18

• • D. a^2 - ab

A shape on a coordinate grid is reflected in the x-axis and then translated two units to the right and five units down.

If the original shape had a point at coordinates (a, b), what are the coordinates of the corresponding point after the transformations?

• • A. (a + 2, −b − 5)

• • B. (a − 2, b + 5)

• • C. (−a + 2, b − 5)

• • D. (a + 2, b − 5)

A local bakery is making a large batch of cupcakes for a school fundraiser. The recipe requires 0.125 kg of flour per cupcake.

If the bakery needs to make 200 cupcakes, how many kilograms of flour will they need in total?

• • A. 2.5

• • B. 12.5

• • C. 25

• • D. 250

In a science experiment, a solution was created by mixing 0.0075 litres of a chemical with water.

If the total volume of the solution was 7.5 litres, how many times was the chemical diluted?

• • A. 100

• • B. 1000

• • C. 10

• • D. 10000

Sarah has been saving up her pocket money for a while and has managed to accumulate £183.75.

She decides to treat herself by spending £37.99 on a new pair of trainers, £22.50 on a top, and £15.80 on a book.

After her shopping spree, how much money does Sarah have remaining?

• • A. £107.46

• • B. £68.17

• • C. £91.66

• • D. £145.45

Amir's local football club is trying to purchase new equipment.

Amir donates £57.80 towards the cause.

The football club manages to raise 50 times the amount Amir donated.

What is the total amount raised by Amir's football club?

• • A. £2890

• • B. £289

• • C. £5780

• • D. £28900

A factory production line produces 24 cars per day and there are 20 production lines in the factory.

The company owns 5 of these factories across the country.

What is the maximum number of cars that could be produced by the company in a day?

• • A. 2400

• • B. 480

• • C. 120

• • D. 24000

A school has 525 students in total across three year groups.

There are 185 students in Year 7 and 165 students in Year 8.

How many students are there in Year 9?

• • A. 175

• • B. 155

• • C. 195

• • D. 135

Amelia is saving up to buy a new bicycle.

She puts her savings into a formula to calculate how much more she needs: 5(x + 23).

The result of the formula is £200.

How much money does Amelia currently have saved?

• • A. £17

• • B. £63

• • C. £85

• • D. £177

A chef begins preparing a meal at 9:15 am. He spends 24 minutes chopping vegetables, followed by 48 minutes cooking the main dish.

After a 12-minute break, he spends 30 minutes preparing the dessert. He then leaves to deliver the meal to a customer.

At what time does the chef leave to deliver the meal?

• • A. 10:57 am

• • B. 11:09 am

• • C. 10:39 am

• • D. 11:21 am