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Number


Answer


Name (first name only)


School
The four fours challenge
Use four fours and any mathematical symbols you know to make numbers from 1 to 100.
The red ones have been done (see the list below).
If you have an answer to any others, please post your solution in the form.
EXAMPLE: 4+4+4+4 = 16 You may use powers, eg 4^2, but you may not use 4s as digits, eg 44
I've used / to mean divide, ^ to show powers, /4 to show the square root of 4, 4!=4x3x2x1

1 (4/4)x(4/4)
2 (4/4)+(4/4) Catie
3 (4+4+4)/4 Lucy T, Sarum St Paul's
4 4 + /4 + /4 -4 JD Gomeldon
5 (4 x 4 + 4)/4
6 4 + /4 + /4 - /4
7 4+4-(4/4) Jess, New Forest
8 4+4+4-4
9 4/4 +4+4 Catie
10 4x4-/4-4 Danny
11 (4!+4!-4)/4 Matthew, St Mark's
12 4^2 + 4 - 4 - 4 Katherine
13 (4! + 4! + 4) /4 Genius! No name given
14 4 x 4 + /4 -4 Lucy T, Sarum St Paul's
15 4 x 4 - (4/4) Aliesha, Longford
16 4 + 4 + 4 + 4 Mr Williams St Mark's
17 (4/4) + (4 x 4) Catie
18 (4x4) + 4 - /4 Alice, St Mark's
19 4!-4-4/4 Kristen, Latrobe High School, Tasmania
20 4^3+4^2-4^3+4 Matthew, St Mark's
21 (4^2 + 4^3 + 4^4) / 4^2 Erika, Greentrees Genius!!
22 4 x 4 + 4 + /4 Danny
23 ((4+4^3)+4!)/4 Kristen, Latrobe High School, Tasmania
24 4 x 4 + 4 + 4 Sam, Stratford sub Castle
25 ((4!x4)+4) /4 Mark, Greentrees
26 4! - 4 + 4 + /4 Hettie, Christ the King
27 4!+4 - (4/4) Aliesha, Longford
28 4 + 4 x 4 -4 Keegan, AWGS
29 4! + 4 + 4/4 Alice, St Mark's
30 4! + 4 + 4 - /4 Hettie, Christ the King
31 ((4! + 4)/4) +4! Michael
32 (4 x 4) + (4 x 4) Elias
33
34 (4 + 4) x 4 + /4 Ed, Sarum St Paul's
35
36 (4 + 4) x 4 + 4 Elle
37
38 4x4 + 4! - /4 Jordan, St Mark's
39 (4*4-.4)/.4 Scott, MUASD, USA
40 (/4 + 4 + 4) x 4 Jamie, Greentrees
41
42 4! + /4 + (4 x 4) Lucy T
43
44 4! + (4 x 4) + 4 Jess, New Forest
45
46 4! + 4! -4 + /4 Hettie, Christ the King
47 (4!+4!)-(4/4) Matthew, St Mark's
48 (4 + 4 + 4) x 4 Catie
49 4! + 4! - 4/4 Alice St Mark's
50 4! + 4! + 4 - /4 Hettie, Christ the King
Solutions
51
52 4^3 - 4 - 4 - 4 Sam, Stratford sub Castle
53
54 4! + 4! + /4 + 4 Harry, St Mark's
55
56 4! + 4! + 4 + 4, Katherine
57
58 4^2 x 4 - 4 -/4 JD, Gomeldon
59 4^3 - 4/4 -4 Eva, St Mark's
60 4 x 4 x 4 - 4 Ava
61
62 4 x 4 x 4 - /4 Sasha and Amy, St Mark's
63 (4^4 - 4)/4 Mark, Greentrees
64 (4 + 4)(4 + 4)
65 (4^4 + 4)/4 Mr williams (inspired by an idea by James)
66 (4 xl 4 x 4) + /4 Keegan, AWGS
67 (4^3+4)-(4/4) Matthew, St Mark's
68 (4 x 4 x 4) + 4 Keegan, AWGS
69 (4^3 + 4)+ (4/4) Matthew, St Mark's
70 4! + 4! + 4! + /4 Hannah, St Mark's
71
72 4! + 4^2 + 4^2 + 4^2 Elias, Sarum St Paul's
73
74 4! + 4! + 4! + /4 JD, Gomeldon
75 (4!/4+4!)/.4 Jack, Westfield
76 4! + 4! + 4! + 4
77
78
79
80 (4 x 4 + 4) x 4 Ed, Sarum St Paul's
81
82
83
84 (4 + 4)^2 + 4^2 + 4 Elias, Sarum St Paul's
85 (4/.4 + 4!)/.4 Scott, MUASD, USA
86 4^3 + 4^2 + 4 + /4 Arun, Isleworth and Syon
87 4^3 + 4! -4/4 Mr W, St Mark's
88 4! x 4 - 4 - 4 Ben, Sarum St Paul's
89 4^3 + 4! + 4/4 Mr W, St Mark's
90 4! x 4 -4 -/4 Emily, St Mark's
91
92 4! x 4 - /4 - /4 Elen, St Mark's
93
94
95 (4x4!)-(4/4) Matthew, St Mark's
96 -4^2 + 4^3 - 4^2 + 4^3 Oliver, Gomeldon
97 (4! x 4) + (4/4) Andrew, St Mark's
98 (4! x 4) + 4 -/4 Oliver, Gomeldon
99
100 (4! + (4/4)) x 4 Catie
Latest answers...
75 (4!/4+4!)/.4 Jack, Westfield
31 ((4! + 4)/4) +4! Michael
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