Are Marymede parents smarter than a Year 9 Maths student?

• 6

• 7

• 8

• 9

Answer explanation

Rules of BODMAS apply

Calculate the median from the following data set:

1, 2, 2, 5, 4, 3, 2, 2, 1

• 2

• 3

• 4

• 5

Answer explanation

The median is the middle value however, the numbers must be in ascending order.

0.75 is the equivalent of 75%.

What would the decimal equivalent of 9% be?

• 0.009

• 0.09

• 0.9

• 0.99

Answer explanation

The word percent means out of 100. We can divide the percentage by 100 to find the decimal equivalent.

A plot of land in South Morang has an area of 450 square metres. The length of the plot is twice the width. How much fencing would be required to block out the neighbours?

• 50 metres

• 60 metres

• 75 metres

• 90 metres

Answer explanation

Length = 30 metres

Width = 15 metres

Add up the side lengths but you wouldn’t fence the front of your house, therefore:

30 + 30 + 15 = 75 metres

Tom has $5,000 in a savings account. He accrues a flat rate of interest of 6% per annum. Assuming he doesn’t touch his account balance. How much will he have in his account after 4 years?

• $1,200

• $5,600

• $6.200

• $6,580

Answer explanation

6% of $5,000 = $300

$300 x 4 years = $1,200

$5,000 + $1,200 = $6,200

This Toblerone has a perpendicular height of 5cm, a base width of 4cm and a depth of 20cm. Calculate the volume in cubic centimetres.

(a)  

Consider the following data set:

2, 3, 3, 4, 5, 7, 7, 8, 10, 12, 14, 15, 16, 16, 20

If the LQ was 4 and the UQ was 15.

What percentage of the data was over 15?

• 0%

• 25%

• 50%

• 75%

Answer explanation

The Upper Quartile represents the 75% mark for a data set. Any value above would be in the top 25%.

Find the gradient of the line pictured.

Answer explanation

Gradient is the change in height divided by the change in width. The top point is 5 squares above and 3 squares wide from the bottom. Any line sloping in the direction shown is negative.

Answer explanation

Rearrange:

-12 = 6k

Divide by 6:

k = -12 divided by 6

A hiker heads due North for 3 km. He then turns and travels due East for 4 km. How far is he from his starting point?

• 5 km

• 6 km

• 6.4 km

• 7 km

Answer explanation

Pythagoras Theorem