两道较容易的六年级等可能事件题、、大家帮帮忙~~~急~~~~~~~~~~~

2025-02-28 19:06:56
推荐回答(3个)
回答1:

枚举法,必须举出数字组合并验证是否素数。
当然对个位为偶数的、为5的或组成的数字都相等的,可以快速排除。

1、
个位1到6,十位也是1到6,共有6×6种数字组合。
其中组成素数有:
11、13、23、31、41、43、53、61
这8种。
可能种数 = 9
概率 = 8/36 = 22.22%

2、
三位数的种数 = 6*6*6 = 216种
其中素数有:
113、131、151、163、211、223、233、241、251、263、311、313、331、353、421、431、433、443、461、463、521、523、541、563、613、631、⑥④1、⑥④3、653、661
这30种。
可能种数 = 30
概率 = 30/216 = 13.⑧⑨%

回答2:

骰子最大是6 两次最大是66
6年纪应该有列过表格 自己去查下66一下的素数有几个然后除以66
这是最大是666
2, 3, 5, 7, 11, 13, 17, 19, 23, 29,
31, 37, 41, 43, 47, 53, 59, 61, 67, 71,
73, 79, 83, 89, 97, 101, 103, 107, 109, 113,
127, 131, 137, 139, 149, 151, 157, 163, 167, 173,
179, 181, 191, 193, 197, 199, 211, 223, 227, 229,
233, 239, 241, 251, 257, 263, 269, 271, 277, 281,
283, 293, 307, 311, 313, 317, 331, 337, 347, 349,
353, 359, 367, 373, 379, 383, 389, 397, 401, 409,
419, 421, 431, 433, 439, 443, 449, 457, 461, 463,
467, 479, 487, 491, 499, 503, 509, 521, 523, 541,
547, 557, 563, 569, 571, 577, 587, 593, 599, 601,
607, 613, 617, 619, 631, 641, 643, 647, 653, 659,
661, !!! 673, 677, 683, 691, 701, 709, 719, 727, 733,
739, 743, 751, 757, 761, 769, 773, 787, 797, 809,
811, 821, 823, 827, 829, 839, 853, 857, 859, 863,
877, 881, 883, 887, 907, 911, 919, 929, 937, 941,
947, 953, 967, 971, 977, 983, 991, 997
在我打感叹号以上的数,数下并处以666

回答3:

哎 有人先答了啦 第二个回答完全正确

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