|
|
44 |
44
蚯蚓
|
78 / 141 |
3 |
|
|
64 |
64
双栈排序
|
5 / 79 |
9 |
|
|
94 |
94
奇怪的数独
|
55 / 150 |
5 |
|
|
95 |
95
虫食算
|
63 / 110 |
3 |
|
|
96 |
96
玛雅游戏
|
21 / 36 |
3 |
|
|
101 |
101
字串变换
|
58 / 355 |
8 |
|
|
111 |
111
Hankson的趣味题
|
22 / 38 |
3 |
|
|
114 |
114
同余方程
|
42 / 77 |
3 |
|
|
122 |
122
计算系数
|
30 / 48 |
2 |
|
|
144 |
144
换教室
|
17 / 18 |
4 |
|
|
168 |
168
关押罪犯
|
27 / 52 |
3 |
|
|
186 |
186
传纸条
|
52 / 87 |
2 |
|
|
206 |
206
开车旅行
|
3 / 6 |
10 |
|
|
222 |
222
乌龟棋
|
62 / 96 |
2 |
|
|
251 |
251
最优贸易
|
13 / 13 |
6 |
|
|
261 |
261
树网的核
|
3 / 25 |
9 |
|
|
264 |
264
天天爱跑步
|
3 / 5 |
10 |
|
|
267 |
267
疫情控制
|
8 / 29 |
7 |
|
|
475 |
475
加分二叉树
|
40 / 60 |
1 |
|
|
544 |
544
你要乘坐的飞碟在这里-Your Ride Is Here
|
36 / 102 |
5 |
|
|
545 |
545
贪婪的送礼者Greedy Gift Givers
|
15 / 26 |
5 |
|
|
546 |
546
黑色星期五Friday the Thirteenth
|
10 / 12 |
8 |
|
|
547 |
547
坏掉的项链Broken Necklace
|
31 / 72 |
4 |
|
|
548 |
548
挤牛奶Milking Cows
|
8 / 11 |
8 |
|
|
549 |
549
方块转换 Transformations
|
7 / 8 |
9 |
|
|
550 |
550
命名那个数字 Name That Number
|
1 / 55 |
10 |
|
|
551 |
551
回文平方数 Palindromic Squares
|
11 / 17 |
6 |
|
|
552 |
552
双重回文数 Dual Palindromes
|
0 / 4 |
10 |
|
|
553 |
553
混合牛奶 Mixing Milk
|
59 / 265 |
7 |
|
|
554 |
554
修理牛棚 Barn Repair
|
57 / 134 |
4 |
|
|
555 |
555
最长的回文 Calf Flac
|
3 / 7 |
10 |
|
|
556 |
556
牛式 Prime Cryptarithm
|
9 / 9 |
9 |
|
|
557 |
557
时钟 The Clocks
|
1 / 5 |
10 |
|
|
558 |
558
铺放矩形块 Packing Rectangles
|
2 / 6 |
10 |
|
|
559 |
559
等差数列 Arithmetic Progressions
|
4 / 8 |
10 |
|
|
560 |
560
母亲的牛奶 Mother's Milk
|
5 / 6 |
10 |
|
|
561 |
561
数字三角形 Number Triangles
|
251 / 685 |
5 |
|
|
562 |
562
回文质数 Prime Palindromes
|
15 / 45 |
6 |
|
|
563 |
563
特殊的质数肋骨 Superprime Rib
|
4 / 5 |
10 |
|
|
564 |
564
跳棋的挑战 Checker Challenge
|
12 / 33 |
6 |
|
|
565 |
565
城堡 The Castle
|
8 / 26 |
7 |
|
|
566 |
566
顺序的分数 Ordered Fractions
|
3 / 3 |
10 |
|
|
567 |
567
三值的排序 Sorting a Three-Valued Sequence
|
8 / 10 |
9 |
|
|
568 |
568
健康的荷斯坦奶牛 Healthy Holsteins
|
14 / 19 |
5 |
|
|
569 |
569
海明码 Hamming Codes
|
83 / 203 |
5 |
|
|
570 |
570
序言页码 Preface Numbering
|
2 / 2 |
10 |
|
|
571 |
571
集合 Subset Sums
|
6 / 13 |
8 |
|
|
572 |
572
循环数 Runaround Numbers
|
3 / 6 |
10 |
|
|
573 |
573
派对灯 Party Lamps
|
17 / 19 |
4 |
|
|
574 |
574
最长前缀 Longest Prefix
|
3 / 7 |
10 |
|
|
575 |
575
奶牛家谱 Cow Pedigrees
|
17 / 35 |
4 |
|
|
576 |
576
和为零 Zero Sum
|
7 / 7 |
9 |
|
|
577 |
577
货币系统 Money Systems
|
83 / 224 |
5 |
|
|
578 |
578
控制公司 Controlling Companies
|
2 / 3 |
10 |
|
|
579 |
579
两只塔姆沃斯牛 The Tamworth Two
|
2 / 3 |
10 |
|
|
580 |
580
穿越栅栏 Overfencing
|
3 / 11 |
9 |
|
|
581 |
581
回家 Bessie Come Home
|
21 / 49 |
5 |
|
|
582 |
582
牛的旅行 Cow Tours
|
6 / 7 |
9 |
|
|
583 |
583
分数化小数 Fractions to Decimals
|
3 / 3 |
10 |
|
|
584 |
584
最短网络Agri-Net
|
22 / 33 |
2 |
|
|
585 |
585
总分 Score Inflation
|
41 / 85 |
4 |
|
|
586 |
586
丑数 Humble Numbers
|
5 / 13 |
9 |
|
|
587 |
587
形成的区域 Shaping Regions
|
3 / 3 |
10 |
|
|
588 |
588
联系 Contact
|
2 / 3 |
10 |
|
|
589 |
589
邮票 Stamps
|
23 / 64 |
5 |
|
|
590 |
590
阶乘 Factorials
|
4 / 20 |
9 |
|
|
591 |
591
串 Stringsobits01
|
2 / 3 |
10 |
|
|
592 |
592
纺车的轮子 Spinning Wheels
|
5 / 6 |
10 |
|
|
593 |
593
饲料调配 Feed Ratios
|
3 / 3 |
10 |
|
|
594 |
594
魔板 Magic Squares
|
2 / 2 |
10 |
|
|
595 |
595
香甜的黄油 Sweet Butter
|
7 / 30 |
8 |
|
|
596 |
596
骑马修栅栏 Riding the Fences
|
27 / 166 |
8 |
|
|
597 |
597
商店购物 Shopping Offers
|
2 / 2 |
10 |
|
|
598 |
598
亚瑟王的宫殿 Camelot
|
1 / 3 |
10 |
|
|
599 |
599
家的范围 Home on the Range
|
9 / 10 |
9 |
|
|
600 |
600
游戏 A Game
|
1 / 2 |
10 |
|
|
601 |
601
闭合的栅栏 Closed Fences
|
0 / 3 |
10 |
|
|
602 |
602
美国血统 American Heritage
|
30 / 39 |
1 |
|
|
603 |
603
电网 Electric Fences
|
1 / 5 |
10 |
|
|
604 |
604
“破锣摇滚”乐队 Raucous Rockers
|
2 / 3 |
10 |
|
|
605 |
605
麦香牛块 Beef McNuggets
|
4 / 4 |
10 |
|
|
606 |
606
栅栏的木料 Fence Rails
|
4 / 7 |
10 |
|
|
607 |
607
篱笆回路 Fence Loops
|
4 / 10 |
9 |
|
|
608 |
608
解密牛语 Cryptcowgraphy
|
2 / 9 |
10 |
|
|
609 |
609
草地排水 Drainage Ditches
|
3 / 3 |
10 |
|
|
610 |
610
完美的牛栏 The Perfect Stall
|
0 / 6 |
10 |
|
|
611 |
611
工序安排 Job Processing
|
8 / 8 |
9 |
|
|
612 |
612
奶牛自行车 Cowcycles
|
1 / 3 |
10 |
|
|
613 |
613
逢低吸纳 Buy Low, Buy Lower
|
48 / 139 |
6 |
|
|
614 |
614
素数方阵 The Primes
|
2 / 11 |
10 |
|
|
615 |
615
街道赛跑 Street Race
|
1 / 4 |
10 |
|
|
616 |
616
字母游戏 Letter Game
|
0 / 48 |
10 |
|
|
617 |
617
棋盘游戏 Shuttle Puzzle
|
2 / 2 |
10 |
|
|
618 |
618
追查坏牛奶 Pollutant Control
|
2 / 5 |
10 |
|
|
619 |
619
重叠的图像 Frame Up
|
1 / 3 |
10 |
|
|
620 |
620
圈奶牛 Fencing the Cows
|
2 / 3 |
10 |
|
|
621 |
621
夜空繁星 Starry Night
|
2 / 4 |
10 |
|
|
622 |
622
乐曲主题 Musical Themes
|
3 / 5 |
10 |
|
|
623 |
623
蜗牛的旅行 Snail Trails
|
1 / 1 |
10 |
|
|
624 |
624
电网 Electric Fences
|
2 / 5 |
10 |
