MYP 2 revision

Number Cruchers

100

Calculate 12 - 3 x 3 + 6 x 2

15

200

Round 4728 to the nearest hundred. 

4700

300

What is 11.25 divided by 0.5? 

22.5

400

Find the HCF (highest common factor) of 24 and 36. 

12

500

Calculate 2(8 x 3 - √(8² + 6²)) + 3² x 2³

100

Brain Boosters

100

What has to be broken before you can use it? 

An egg

200

A farmer has 15 sheep. All but 9 run away. How many are left?

9

300

What three numbers give the same result when added or multiplied? 

1, 2, 3

400

A cube has 8 corners. If you cut off one corner, how many corners is there now? 

10

500

You planted sunflower seeds in your garden. Every day, the number of flowers doubles. If it takes 52 dats for the flowers to fill the garden, how many days would it take for them to fill half the garden? 

51 days

Fractions, Decimals & Percentages

100

Write 1/5 as a decimal. 

0.2

200

Simplify 18/24

3/4

300

Add 3/8 + 5/12

19/24

400

Find 15% of 200. 

30

500

A laptop costs $800 and it is on sale for 15% off. You go to buy it and also use a coupon to get an additional 10% off. What is the final price? 

$612

Algebra Zone

100

Substitute and find the value of the expressions: 15 - 3x, when x=2

9

200

Solve 12x=96

x=8

300

Find an expression for: "three less than twice a number n"

2n - 3

400

Find (x + 4)/6 when x=20

4

500

Solve (4h)/11 + 23 = 15

-22

Think Outside the Box

100

What goes up but never comes down? 

Age

200

What occurs once in every minute, twice in every moment, but never in a thousand years? 

The letter "m"

300

You need exactly 4 liters of water, but only have a 3 liter jug and a 5 liter jug. The jugs don't have any measurements on them. How do you do it without estimating? 

Fill 5l; pour that into 3l; empty 3l; pour the remaining 2l into 3l jug; fill 5l again; pour until 3l is full; exactly 4l left in 5l jug. 

400

You are in a dark room with one match, a candle, a lantern, and a fireplace. Which do you light first? 

The match

500

You have 3 switches in one room and 3 light bulbs in another (you can't see the bulbs from the switches). You can only go into the bulb room once. How can you figure out which switch controls which bulb? 

Turn on the first switch for a while, then turn it off. Turn on the second switch and leave it on. Enter the bulb room: the bulb that is lit = switch 2; the turned off but warm = switch 1; the turned off and cold = switch 3.