Circles
A circle has centre (0,0) and a radius of 9. State the equation of the circle.
x2 + y2 = 81
What is the smallest continent by area?
Australia
How many metres are there in 12,000 mm?
12 metres
12, -6, 3, -1.5, ____
0.75
If you look at the numbers on a phone keypad and multiply them all – what number do you get?
0
A circle has a centre (-5, 0) and radius 10. State the equation of the circle.
(x + 5)2 + y2 = 100
Which ocean is between America and Australia?
Pacific Ocean
How many square metres are there in 10,000 cm2?
1 m2.
2, 1, 1/2, 1/4, 1/8, ____
1/16
Your parents have 6 sons including you. Each son has a sister. How many people in the family?
9 family members.
A circle has a centre (2, -4) and a radius of 6. State the equation of the circle.
(x - 2)2 + (y + 4)2 = 36
The equator is the line at 0º longitude or 0º latitude?
0º latitude
How many mm3 are there in 5 cm3?
5000 mm3.
1, 2, 3, 5, 8, 13, ____
21
Domino page 6.
C
A circle has a centre of (-2, 3) and diameter of 16. State the equation of the circle.
(x + 2)2 + (y - 3)2 = 64
1 Australian Dollar can buy 1.10 NZD. How much Australian Dollar must Jane have to buy 2000 NZD for her summer trip this December?
About 1,818 AUD.
A commercial airplace average speed is 860 km/h. How many m/s does the airplane travel?
Approximately 239 m/s.
1, 4, 9, 16, 25, ___
36
Puzzle page 8
60.
Find the coordinate of the points where the circle x2 + y2 = 25 intersects with the line y = 3..
(4, 3) and (-4, 3)
Places in the world are located in different time zones. The time zones are defined based on the reference point at Greenwich in UK. Perth is in the GMT+8 timezone and New York is located at GMT-5 timezone. If it is 9am in Perth, what time is it in New York?
8pm previous day.
1 m3 = 1000 L.
How many kL is required to fill in a rectangular pool with a size of 9 m x 4 m and a depth of 1.5 m?
54 kL.
1/2, 4, 1/4, 7, 1/8, 10, ____
1/16
Puzzle 5, page 9.
Total 27 kg. Dog 17 kg. Cat and rabbit 10 kg.