Download flow many hours and minutes are there between 10:22 a

YEAR EIGHT Mathex 2011
Team
Question 1
A marathon race started at 11.30am and the winner finished at 1.47pm the same day. What
was the winner’s time in minutes?
YEAR EIGHT Mathex 2011
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Question 2
$25 is less than $50 by 50%. By how many % is $50 greater than $25?
YEAR EIGHT Mathex 2011
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Question 3
Maria has lived 1/3 of her life in Wellington, ¼ of her life in Dunedin and the other 5 years in
Palmerston North. How old is Maria?
YEAR EIGHT Mathex 2011
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Question 4
A clock is set correctly at 1pm. It loses 3 minutes every hour. What will the clock read when it
is 10am the next day?
YEAR EIGHT Mathex 2011
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Question 5
What is the sum of the first 20 odd counting numbers?
YEAR EIGHT Mathex 2011
Question 6
Find the missing number in the table below:
7
3
11
9
5
22
?
2
27
Team
YEAR EIGHT Mathex 2011
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Question 7
What are the next two whole numbers greater than 1009?
YEAR EIGHT Mathex 2011
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Question 8
If a rectangle has a perimeter of 24cm and one side is twice as long as another, what is its area
In square centimetres?
YEAR EIGHT Mathex 2011
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Question 9
Two cannons are fired together at 8.00am. One cannon then fires again every 120 minutes
whilst the other cannon continues to fire every 75 minutes. At what time will the two cannons
both fire again at the same time?
YEAR EIGHT Mathex 2011
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Question 10
What numbers comes at the end of this sequence?
1, 5, 7, 13, 25, 45, 83, 153, 281, 517, ________
YEAR EIGHT Mathex 2011
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Question 11
The ages of a father and son add up to 55. The father’s age is the son’s age reversed. How old
are they?
Father:
Son:
YEAR EIGHT Mathex 2011
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Question 12
You put one magic $1 coin into a box. The coin is converted into 2 such magic $1 coins in
one minute. Then those two coins are converted into 4 such coins in one minute, and so on. It
takes 12 minutes to fill the box. How long does it take to fill the box if you initially 2 such
magic coins in the box instead of one?
YEAR EIGHT Mathex 2011
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Question 13
What is the value of 92 x 33
YEAR EIGHT Mathex 2011
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Question 14
What is the least number of different colours needed to paint a cube so that no two adjacent
faces have the same colour?
YEAR EIGHT Mathex 2011
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Question 15
How many digits are needed to number all the 45 houses in a street?
(Each house number appears once only on their letter box)
YEAR EIGHT Mathex 2011
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Question 16
By what number must ½ be divided by to get 3 as an answer?
YEAR EIGHT Mathex 2011
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Question 17
All my ties are red except two. All my ties are blue except two. All my ties are brown except
two. How many ties do I have?
YEAR EIGHT Mathex 2011
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Question 18
How many tickets with different points of origin and destination can be sold on a bus line that
travels a loop of 25 stops?
YEAR EIGHT Mathex 2011
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Question 19
Riding at 20 km/h how long would it take to ride 25 km?
YEAR EIGHT Mathex 2011
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Question 20
By placing a 1 at both ends of a number, its value is increased by 14789. What is the sum of
the digits of the original number?
Tie Breaker 1:
In a group of 40 students, 20 play tennis, 19 play volleyball and 6 play both tennis and
volleyball. How many students play neither tennis nor volleyball?
Tie Breaker 2:
If a 75 minute test starts at 10:40 am when will it finish?
YEAR 8 ANSWERS 2011
1.
137
2.
100%
3.
12
4.
8.57am
5.
400
6.
10
7.
1010, 1011
8.
32 - no units needed
9.
6.00pm
10. 951
11.
41 and 14 ( note 23 and 32 are possible but invalid so mark as incorrect)
12. 11 minutes
13.
2187
14.
3
15. 81
16. 1/6
17. 3
18. 600
19.
1 hr 15 min or 75 mins
20. 10
Tie Breaker 1.
7
Tie Breaker 2.
11.55am