Angles in Polygons
If you have a nine sided figure, what is the sum of the interior angles?
1260
An alloy contains 26 % of copper. What quantity of alloy is required to get 260 g of copper?
1000 g
Expand:
(2x+3)(x-5)
2x2 -7x-15
Carl has a soccer game every 4th day, Matt has one every 5th day. When will they have a game on the same day?
20th day
Find the probability of getting a numbered card when a card is drawn from the pack of 52 cards.
9/13
What would be the total sum of the interior angles of a heptagon?
900
In an exam Ashley secured 332 marks. If she secured 83 % makes, find the maximum marks.
400
Factorise: 20x2 -35x3y
5x2(4-7xy)
Shannon is making identical balloon arrangements for a party. She has 32 maroon balloons, 24 white balloons, and 16 orange balloons. She wants each arrangement to have the same number of each color. What is the greatest number of arrangements that she can make if every balloon is used?
8
A bag contains 3 red balls and 4 black balls. A ball is drawn at random from the bag. Find the probability that the ball drawn is (i) black (ii) not black.
i) 4/7 ii) 3/7
An interior angle in a regular polygon measures 150 degrees, tell the number of sides.
12
In a basket of apples, 12% of them are rotten and 66 are in good condition. Find the total number of apples in the basket.
75
Think of a number. Double the number. Subtract 6 from the result and divide the answer by 2. The quotient will be 20. What is the number?
23
What is the smallest number that needs to be multiplied by 192 to make it a perfect square?
3
A bag contains fifteen red balls, twelve pink balls, and eight yellow balls. You pick one without looking. What is the probability that the balls will be either yellow OR pink?
4/7
A nonagon (9 sides) has 8 equal interior angles x and one interior angle 4x , find the value of x.
105
In an election, there are a total of 80000 voters and there are two candidates, X and Y. 80 % of the voters go for polls out of which 60 % vote for X. How any votes does Y get?
25,600
If, a=-2 ; b = 3 and c = -10
Evaluate: 5a2-2bc
80
What is the smallest number that needs to be multiplied by 972 to make it a perfect cube?
6
A bag contains 400 coloured counters. The counters are either yellow, brown or green. There are 92 yellow counters in the bag. The probability that a brown counter is chosen from the bag is 0.13 Calculate the number of green counters in the bag.
256
In a regular polygon, each interior angle is 160 greater than each exterior angle. How many sides has the polygon?
36
Jack bought 4 dozen eggs at $10 per dozen. 6 eggs were broken and he sold the remaining at $1.20 each. Calculate his profit percentage?
26%
. Twice a number is 500 more than six times the number. What is the number?
-125
The length, breadth, height of a room are 6 m 80 cm, 5 m 10 cm and 3 m 40 cm respectively. Find the longest tape which can measure the dimensions of the room exactly.
1 m 70 cm
Tony makes a fair six-sided spinner. The spinner has the numbers 7, 8 and 9 on it. The probability the spinner will land on 7 is greater than the probability that the spinner will land on 8. The probability that the spinner will land on 9 is ⅓ Write the numbers on the spinner
9,9,7,7,7,8