MATHS QUIZ 3

[Ian]

Q6. one

correct

Woo Hoo, I had to read through the questions twice to find one I could do

[magpie in the 80's]

Q6. one

correct

Woo Hoo, I had to read through the questions twice to find one I could do

THE EASIER ONE'S WERE ANSWERED EARLIER

[Kahuna]

13/ 7.00cm

[Professor]

Q4. n=3

Q15. Area=x^2-256 cm^2 , x>16

[magpie in the 80's]

13/ 7.00cm

CORRECT

[magpie in the 80's]

Q4. n=3

Q15. Area=x^2-256 cm^2 , x>16

BOTH CORRECT PROFESSOR

[magpie in the 80's]

only 7 left

[magpie in the 80's]

only 7 left

PROFESSOR, SMAC KAHUNA ANYONE

[Kahuna]

8/ 2400 cm2

[magpie in the 80's]

8/ 2400 cm2

incorrect

[smac]

3. 5 (1,3,5,7,9)

[smac]

8. 2400 cm^2 (6 sides @ 20cm x 20cm = 6 * 400 = 2400)

[magpie in the 80's]

3. 5 (1,3,5,7,9)

YOU GOT THE 5 POSITIVE SMAC
Answer: infinite
A true statement containing the signs form "more than" and ‘less than’ is called an inequality. First we solve the inequality like an algebraic equation:
2x – 1 is less than 20
2x is less than 20 + 1
2x is less than 21
x is less than 21/2
x is less than 10 ½
This means that the solution for x is any odd number below 10 ½. There are 5 positive solutions for x and infinite negative solutions, because all negative odd numbers are smaller than 10 ½ and 5 + infinity = infinity!

[magpie in the 80's]

8. 2400 cm^2 (6 sides @ 20cm x 20cm = 6 * 400 = 2400)

CLOSE

Answer: The correct answer was Cannot be determined.

We cannot find the surface area of a cuboid unless we know its length, width and height. In this question, the cuboid's width and height is not given, therefore its surface area cannot be determined.
The formula for finding the surface area of a cuboid is:
Surface area of cuboid = 2 ([l*h] + [w*h] + [l*w]), where l is the length of the cuboid, w is the width and h is the height.
------------------------------ or -----------------------------------
Surface area of cuboid = area of face 1 + area of face 2 + area of face 3 + area of face 4 + area of face 5 + area of face 6

40% of players have answered correctly.

[spell_check]

I'm going to have a go at no.19: 1

[magpie in the 80's]

I'm going to have a go at no.19: 1

INCORRECT SPELLY

[Professor]

Q1. 3X^8Y^2

Q16. 0.56m

Q17. 266

Q19. 2.2

[magpie in the 80's]

Q1. 3X^8Y^2

Q16. 0.56m

Q17. 266

Q19. 2.2

absolute champion professor
all correct

[magpie in the 80's]

1. What is the value of 3x^2 (y[x^3])^2? 3X^8Y^2
2. A car costing $3000 is sold at a loss of 5% on the cost price. What is the selling price? $2850
3. How many solutions are there for 2x - 1 < 20, given that x is an odd number? INFINATE
4. The weights of x, y and z are in the ratio 2:n:4. On a pie chart, the angle corresponding to x is 80 degrees. Find n. 3
5. An ordinary six-sided die is rolled. What is the probability that the score is not 1? 83.3%
6. In a group of 30 boys, 15 like dice games, 12 like card games, x like both and 4 like neither. How many boys like both dice and card games? 1
7. What is the size of an interior angle (in degrees) of a regular pentagon? 108
8. What is the surface area of a cuboid (rectangular prism) with length 20 cm? CANNOT BE DETERMINED
9. What is the number called located on the bottom part of a fraction? DENOMINATOR
10. Anne scores 1/2 as many marks as Betty, and Betty scores 1/2 as many marks as Cathy. If the sum of their marks is 112, how many marks did Anne score? 16
11. Near the beach there is a floating ship. Over the board is hauled down a rope ladder with 10 steps. The distance between every two steps is 30cm. The lowest step lays on the water surface. The tide is coming and every hour the water rises with 15cm. When will the water get to the third step of the ladder? IT WON'T BECAUSE THE SHIP WILL RISE WITH THE TIDE
12. Which of these percentage increases is the greatest?
A) From 13 to 81 B) From 1 to 69 C) All of them are equal D) From 12 to 80 B) FROM 1 TO 69
13. A cube measures y cm on a side. If the surface area of the cube is 294 square centimetres, what is y (correct to 2 decimal places)? 7.00CM
14. Finish this sequence by writing in the next appropriate word ... triangle, quadrilateral, pentagon, __________ ? HEXAGON
15. The length of a rectangle is (x + y) cm and the breadth is (x - y) cm. If y = 2t + 28, where t is the negative square root of 36, find the area of the rectangle. (X^2-256)CM^2
16. A stick (1.12 * 10^0) metres long is divided into 3 parts between Anne, Carol and Ben in the ratio 1:3:4. Find the length of the part of the stick Ben receives. 56CM
17. Given that 2^x = 7, and 2^y = 38, find 2^(x + y). 266
18. What will applying the formula: 'Multiplying the base and the height and then dividing by two' give you an answer for? AREA OF A TRIANGLE
19. What is the arithmetic mean of - 8, (2 - [- 8]), 3, 7 and - 1? 2.2
20. Which area of Mathematics deals with protractors, segments, circumferences and sectors? GEOMETRY

END OF QUIZ