Skip to content
A Level
Find course
Features
Quick links
Open app
A Level
Maths OCR (MEI)
Question bank
1.1.3 Proof by contradiction (A-level only)
Easy
Medium
Hard
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
Question 19
Calculator
Highlight
Mark as complete
Markscheme
Use the method of proof by contradiction to show that
5 \sqrt{5}\,
5
is an irrational number.
[6]
Write your answer here...
Markscheme
Ask Genie
3
Grade answer
Ask me anything!
1.1.3 Proof by contradiction (A-level only) Questions
A Level
/
Maths
/
1.1.3 Proof by contradiction (A-level only)
