Extra Revision Flashcards
(40 cards)
1
Q
What is a triangular number?
A
A number that can be arranged to make a triangle.
1+2+3=6
2
Q
What is the formula for a triangular number?
A
n ×(n+1)/2
3
Q
What is Eulers Law
A
(Faces + Vertices) – Edges = 2
4
Q
Prism
Faces
A
Number of sides + 2
(of the 2D shape)
5
Q
Prism
Edges
A
Number of sides x 3
(of the 2D shape)
6
Q
Prism
Vertices
A
Number of sides x 2
(of the 2D shape)
7
Q
What are the first 5 prime numbers
A
2,3,5,7,11
8
Q
What are the first 10 prime numbers
A
2,3,5,7,11,13
17,19,23,29
9
Q
What are the first 15 prime numbers
A
2, 3, 5, 7, 11, 13,
17, 19, 23, 29, 31
37, 41, 43, 47, 53
10
Q
112
A
121
11
Q
122
A
144
12
Q
132
A
169
13
Q
142
A
196
14
Q
152
A
225
15
Q
162
A
256
16
Q
172
A
289
17
Q
182
A
324
18
Q
192
A
361
19
Q
202
A
400
20
Q
53
A
125
21
Q
63
A
216
22
Q
73
A
343
23
Q
83
A
512
24
Q
93
A
729
25
103
1000
26
What is a composite number?
A number that has at least 3 factors including 1 and itself.
eg 8 = 1,2,4,8
27
What is a prime number?
A number that only has two factors 1 and itself
28
29
30
31
2
32
3
33
4
34
5
35
6
36
7
37
8
38
9
39
10
40
