Number
Round 1852 to the nearest thousand.
2000
What descriptor would you use for the probability for rolling a 5 on a fair six-sided dice?
Impossible
Unlikely
Even Chance
Likely
Certain
Unlikely
What do the interior angles in a triangle add up to?
180o
3 5 6 9 6 4 3 7 3 8 5
What is the mode from the above list?
Mode = most common = 3
Solve a + 17 = 25
a = 8
Calculate 17 x 22
10 x 22 = 220
7 x 22 = (140 + 14) = 154
17 x 22 = 374
In a classroom of 27 students, 10 of them are boys. What is the probability that a student picked at random from the class is a girl?
27 - 10 = 17
P(Girl) = 17/27
What is the area of a square with side length 11cm?
11 x 11 = 121cm2
18 11 15 22 19 20 14 25 15 12
What is the range from the above data?
Range = Biggest - Smallest
= 25 - 11
= 14
Simplify 5a x 7b
5a x 7b = 35ab
Write 5,800,000 into Standard Form
5,870,000 = 5.8 x 106
The probability that a London underground train arrives early is 0.13.
The probability that the same train arrives exactly on time 0.52.
What is the probability that this train arrives late?
0.13 + 0.52 = 0.65
1 - 0.65 = 0.35
How many millilitres in 1.75 litres?
1 litre = 1000ml
1.7 litres = 1700ml
1.75 litres = 1750ml
8 13 2 15 5 12 6
What is the median of the above list?
Median = middle of ordered data
Ordered data = 2 5 6 8 12 13 15
Middle value = 10
Expand (x + 5)(3x + 4)
3x2 + 19x + 20
Calculate 2/5 of 400
1/5 of 400 = 80
2/5 = 160
A bag contains red, blue, green and yellow marbles.
The probability that a red marble is taken at random is 0.35.
The probability that a green marble is taken at random is 0.25.
There an equal amount of blue and yellow marbles.
What is the probability that a blue marble is taken at random?
0.35 + 0.25 = 0.6
1 - 0.6 = 0.4
0.4 / 2 = 0.2
What is the volume of a cuboid with a base of 5cm, a length of 2cm and a height of 3.4cm?
Volume of a Cuboid = base x length x height
= 5 x 2 x 3.4
= 10 x 3.4
= 34cm3
5 8 6 9 13 7
Calculate the mean of the above data.
Mean = Total of all Values / Number of Values
5 + 8 + 6 + 9 + 13 + 7 = 48
48 / 6 = 8
Solve
7x - 3 = 2x + 12
-2x on both sides
5x - 3 = 12
+3 on both sides
5x = 15
x = 3
On the 4th January, 2011, VAT (value-added tax) increased from 17.5% to 20%.
Calculate the VAT that would be added onto a shirt that cost £40 in 2008.
In 2008, VAT = 17.5%
10% of £40 = £4
5% = half of 10% = £2
2.5% = half of 5% = £1
17.5% = 4 + 2 + 1 = £7
A dice was rolled 15 times and a '3' came up 4 times.
If the same dice was rolled 180 times, how many '3's would you expect to get?
Expected Number of 3's = P(3) x No. Rolls
No. Rolls = 180
P(3) = 4/15
4/15 x 180 = 4/15 of 180
1/15 = 12
4/15 = 48 -> You'd expect to roll 48 3's.
Angles ABC and BCE are co-interior angles on parallel lines. If angle ABC is 67o, how big is angle BCE?
Interior angles add up to 180o
Angle BCE = 180 - 67
Angle BCE = 113o
5 6 10 ? ? 8 3
The mean of the 5 numbers is 7
The mode of the 5 numbers is 6
The range of the 7 numbers is 8
Work out the missing two numbers.
The missing numbers are 6 and 11.
Solve
-3x + 2 = 5x - 14
+3x on both sides
2 = 8x - 14
+14 on both sides
16 = 8x
2 = x