Enrichment quiz 3

 A number x is added to 5 and the result is squared.

Identify an option that best matches the description above.

• |5x|²

• x²+5

• (5x)²

• (x+5)²

• |x+5|²

A number x is subtracted from 7 and the result is divided by 2.
Identify an option that best matches the description above.

• (7 −x)2

• (7 − x) ÷ 2

• (x÷2) − 7

• (7 ÷ 2) − x

• x − (7 ÷2)

A number x is doubled before subtracted it from 10
and the result is divided by 3.
Identify an option that best matches the description above.

• (2x -10) ÷ 3

• (10 - 2x) ÷ 3

• 2x - 10 ÷3

• (2x ÷ 3) - 10

• x+2 − (10 ÷3)

 A third of a birthday candle was used.
Identify the remaining candle as a fraction of the candle before it was used.

• 3/1

• 1/3

• 3/2

• 2/3

• cannot be determined from the given information

-2 + 3(4 + x) – 6 = 0
Find the value x.

• 4

• -4

• 4/3

• -4/3

• -3/4

-7 + (x + 2) +  7 = 0
Enter your answer for x in the blank ______.

The weight of three school bags is 15.2 kg.
A school bag weighing 890 g is removed from these three bags.
The weight of the remaining bags is _________________g.

• 143.1

• 1431

• 14310

• 738

• 874.8

The speed of a car is 72 kilometres per hour.
Convert the speed to metres per second.

• 0.02

• 0.2

• 2

• 20

• 200

The length of your finger is usually measured in __________________.
Choose the most appropriate option for the blank above.

• millimeter

• centimeter

• decimeter

• meter

• kilometer

Angel has a rectangular piece of green paper.
Identify the number of lines of symmetry are on this paper.

• none

• 1

• 2

• 3

• 4