An eagleowl sleeps an average of 10 hours a day.
What fraction of the day does an average eagleowl sleep?
`3/4`  `5/12`  `1/3`  `2/3` 




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An eagleowl sleeps an average of 10 hours a day.
What fraction of the day does an average eagleowl sleep?
`3/4`  `5/12`  `1/3`  `2/3` 




`5/12`
`text(Average hours asleep)`
`= 10/24`
`= 5/12`
Yuna used 300 grams of sugar to make 15 cookies.
How many grams of sugar will she need to make 25 cookies?
grams 
`text(500 grams)`
`text(Sugar to make 1 cookie) = 300/15 = 20\ text(grams)`
`:.\ text(Sugar to make 25 cookies)`
`= 25 xx 20`
`= 500\ text(grams)`
Which of these patterns fits the rule, "Double the previous number and deduct 2"?

`3, 4, 5, 6, 9, …` 

`3, 6, 12, 24, 48, …` 

`4, 6, 10, 18, 34, …` 

`4, 10, 22, 46, 94, …` 
`4, 6, 10, 18, 34, …`
`text(By trial and error, consider option 3:)`
`4 xx 2  2 = 6`
`6 xx 2  2 = 10`
`10 xx 2  2 = 18`
`:.\ 4, 6, 10, 18, 34, …\ text(fits the rule.)`
Bernard wants to buy a tennis racquet that has a normal price of $220.
He is given a 10% discount.
What is the value of the discount?
`$2.20`  `$10`  `$22`  `$198`  `$210` 





`$22`
`text(Value of the discount)`
`= 10 text(%) xx 220`
`=$22`
The first number in a pattern is 4.25.
Each number in the pattern is formed by subtracting 0.55 from the previous number.
What is the third number in this pattern?
`4.8`  `3.7`  `3.15`  `2.6` 




`3.15`
`text(2nd number:)\ \ 4.25  0.55 = 3.7`
`text(3rd number:)\ \ 3.7  0.55 = 3.15`
Joel and Clive throw a cricket ball from the boundary of the cricket oval to the wicketkeeper.
It takes Joel's throw 3.52 seconds to reach the wicketkeeper.
It takes Clive's throw 2.79 seconds.
What is the difference in the time taken to reach the wicketkeeper between the two throws?
seconds 
`0.73\ text(seconds)`
`text{One strategy (mental arithmetic):}`
`text(Time Difference)`  `= 3.52  2.79` 
`= 3.52  (3  0.21)`  
`= 0.52 + 0.21`  
`= 0.73\ text(seconds)` 
Jan is selling tickets for a raffle.
Each ticket costs $1.25.
Jan sells a total of 40 tickets.
How much money does Jan collect for selling the tickets?
$ 
`$50`
`text(Money collected)`  `= 40 xx 1.25` 
`= (40 xx 1) + (40 xx 0.25)`  
`= 40 + 10`  
`= $50` 
Petunia gets $6.45 in pocket money each week.
She does extra jobs one week and earns $3.75 more.
How much money did Petunia receive in total in the week?
`$9.10`  `$9.20`  `$10.10`  `$10.20` 




`$10.20`
`$6.45 + $3.75 = $10.20`
Hester placed a leg of lamb into his oven in the morning.
The 1st measurement of the lamb's temperature was −7°C.
Fifteen minutes later, a second temperature reading was taken, which measured 18°C.
What was the change in temperature between the two measurements?
`text(decrease of)\ 25^@text(C)`  `text(decrease of)\ 11^@text(C)`  `text(increase of)\ 25^@text(C)`  `text(increase of)\ 11^@text(C)` 




`text(increase of)\ 25^@text(C)`
`text(Change in temperature)`  `= 18  (7)` 
`= 18 + 7`  
`= 25 text{°C (increase)}` 
A swim squad normally swim 80 laps per training session.
On a light training day, they only do three quarters of the laps of a normal session.
How many laps do they do in a light session?
`20`  `25`  `60`  `65`  `75` 





`60`
`text(Laps)`  `= 3/4 xx 80` 
`= 60` 
A microorganism has a diameter of 0.0008 mm.
Which number below shows this diameter written in scientific notation?
`8.0 xx 10^(4)`  `8.0 xx 10^(3)`  `8.0 xx 10^3`  `8.0 xx 10^4` 




`8.0 xx 10^(4)`
`text(Diameter) = 8.0 xx 10^(4)`
`text(Note:)\ 8 xx 10^(4)`  `= 8/(10\ 000)` 
`= 0.0008` 
`8 xx (2 + 7)` 

`7 xx 2 + 9` 
Which symbol `( <, = , >)` makes the number sentence correct?
`<`  `=`  `>` 



`>`
`text(Evaluate each side:)`
`8 xx (2 + 7)`  `= 8 xx 9 = 72` 
`7 xx 2 +9`  `= 14 + 9 = 23` 
`:. 8 xx (2 + 7)`  `> 7 xx 2 + 9` 