INDEX
4つの4 (Four Fours) は、4つの4と数学記号を使い、さまざまな数を作る数学パズルです。
Four Fours 四則演算のみ
四則演算のみで Four Fours を解く。
0
- 4 * 4 / 4 - 4 = 16 / 4 - 4 = 4 - 4
- 4 + 4 - 4 - 4 = (4 + 4) - (4 + 4) = 8 - 8
- 4 * 4 - 4 * 4 = 16 - 16
- 4 / 4 - 4 / 4 = 1 - 1
- 44 - 44
1
- 4 / 4 * 4 / 4 = ( 4 / 4 ) * ( 4 / 4 ) = 1 * 1
- ( 4 + 4 ) / ( 4 + 4 ) = 8 / 8
- ( 4 * 4 ) / ( 4 * 4 ) = 16 / 16
- ( 4 / 4 ) / ( 4 / 4 ) = 1 / 1
- ( 4 + 4 - 4 ) / 4 = 4 / 4
- 4 / 4 + 4 - 4 = ( 4 / 4 ) + ( 4 - 4 ) = 1 + 0
- 44 / 44
2
- 4 - ( 4 + 4 ) / 4 = 4 - 8 / 4 = 4 - 2
- 4 * 4 / ( 4 + 4 ) = 16 / 8
- 4 / 4 + 4 / 4 = 1 + 1
- 4 / ( (4 + 4) / 4 ) = 4 / ( 8 / 4 ) = 4 / 2
3
- ( 4 * 4 - 4 ) / 4 = ( 16 - 4 ) / 4 = 12 / 4
- ( 4 + 4 + 4 ) / 4 = 12 / 4
4
- ( 4 - 4 ) * 4 + 4 = 0 * 4 + 4 = 0 + 4
- ( 4 - 4 ) / 4 + 4 = 0 / 4 + 4 = 0 + 4
5
- ( 4 * 4 + 4 ) / 4 = ( 16 + 4 ) / 4 = 20 / 4
6
- 4 + ( 4 + 4 ) / 4 = 4 + 8 / 4 = 4 + 2
7
- 4 + 4 - 4 / 4 = 4 + 4 - 1
- 44 / 4 - 4 = 11 - 4
8
- ( 4 + 4 ) * 4 / 4 = ( 4 + 4 ) * ( 4 / 4 ) = 8 * 1
- 4 * 4 / 4 + 4 = 16 / 4 + 4 = 4 + 4
- 4 * 4 - 4 - 4 = 16 - 4 - 4
- 4 + 4 + 4 - 4 = 4 + 4 - 4 + 4 = 4 - 4 + 4 + 4 = - 4 + 4 + 4 + 4
9
- 4 / 4 + 4 + 4 = 1 + 4 + 4
10
- ( 44 - 4 ) / 4 = 40 / 4
11
12
- ( 4 - 4 / 4 ) * 4 = ( 4 - 1 ) * 4 = 3 * 4
- ( 44 + 4 ) / 4 = 48 / 4
13
14
15
- 4 * 4 - 4 / 4 = 16 - 1
- 44 / 4 + 4 = 11 + 4
16
- ( 4 + 4 - 4 ) * 4 = 4 * 4
- 4 * 4 * 4 / 4 = ( 4 * 4 ) * ( 4 / 4 ) = 16 * 1
- 4 * 4 + 4 - 4 = ( 4 * 4 ) + ( 4 - 4 ) = 16 + 0
- 4 + 4 + 4 + 4
17
- 4 * 4 + 4 / 4 = 16 + 1
18
19
20
- ( 4 + 4 / 4 ) * 4 = ( 4 + 1 ) * 4 = 5 * 4
21
22
23
24
- 4 * 4 + 4 + 4 = 16 + 4 + 4
25
26
27
28
- ( 4 + 4 ) * 4 - 4 = 8 * 4 - 4 = 32 - 4
- 44 - 4 * 4 = 44 - 16
最終更新時間:2014年01月04日 17時30分25秒 指摘や意見などあればSandBoxのBBSへ。