1
Q
Percentage increase/decrease =
A
(Change in value / original value) x 100
2
Q
Distance =
A
Speed x Time
3
Q
Speed =
A
Distance / Time
4
Q
Time =
A
Distance / Speed
5
Q
1m in cm
A
100cm
6
Q
1m in mm
A
1000mm
7
Q
1km in m
A
1000m
8
Q
1km in cm
A
100,000cm
9
Q
Area:
1km squared in m squared
A
1,000,000m squared
10
Q
Area:
1m squared in cm squared
A
10,000cm squared
11
Q
Volume:
1m^3 in cm^3
A
1,000,000cm^3
12
Q
Fractions:
0.1 =
A
1/10
13
Q
Fractions:
0.2 =
A
1/5
14
Q
Fractions:
0.25 =
A
1/4
15
Q
Fractions:
0.33 =
A
1/3
16
Q
Fractions:
0.5 =
A
1/2
17
Q
Fractions:
0.66 =
A
2/3
18
Q
Fractions:
0.75 =
A
3/4
19
Q
Fractions:
0.8 =
A
4/5
20
Q
Fractions:
0.9 =
A
9/10
21
Q
How to multiply fractions by whole numbers?
A
Divide the whole number by the bottom number then multiply by the top number
22
Q
1 mile in km
A
1.6km
23
Q
1kg in pounds
A
2.2 pounds
24
Q
1cm in inches
A
0.4 inches
25
How many weeks in a year?
52
26
X:Y is the same as...
X/Y
27
Area of a circle =
Pi x radius^2
28
Circumference of a circle =
Pi x diameter
29
Diameter =
Radius x 2
30
Area of a triangle =
Half of base x height
31
Square numbers:
1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225
32
Cube numbers:
1, 8, 27, 64, 125, 216, 343, 512, 729, 1000, 1331, 1728
33
Cent =
100
34
Milli =
1000
35
Kilo =
1000
36
Mega =
Million
37
Giga =
Billion
38
1cm in mm
10mm
39
Fractions:
0.05 =
1/20
40
Fractions:
0.11 =
1/9
41
Fractions:
0.125 =
1/8
42
Fractions:
0.14 =
1/7
43
Fractions:
0.17 =
1/6
44
Mean =
Add up all values and divide by how many values there are
45
Mode =
Most common value
46
Median =
Middle value when put in order
47
Range =
Difference between highest and lowest values
48
1 metre/second in km/h =
3.6 km/h
49
Ratio of A to B (A:B) =
A/B
50
How many cards in a deck?
52 (not including jokers)
51
1ft in inches
12 inches
52
Increase a value by X% ...
Multiply by 1.X
53
Fractions:
0.15 =
3/20
54
Fractions:
0.6 =
3/5
55
Change in speed =
Acceleration x time
56
Fractions:
0.375 =
3/8
57
Fractions:
0.35 =
7/20
58
Decrease a value by X%
Multiply by 0.X
59
Reverse percentage: to work out original value after percentage increase =
Divide by 1.X
60
Reverse percentage: to work out original value after percentage decrease =
Divide by (1-X)
61
Prime numbers:
A number greater than 1 that is only divisible by 1 and itself:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37...
UCAT Prep
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