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©2025 数学クラブ http://sugaku.club/
月 日（ ）
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[1P1-00]
(1)
23
7
(2)
23
5
(3)
7
5
(4)
23
17
(5)
11
2
(6)
7
3
(7)
13
3
(8)
11
13
(9)
19
5
(10)
5
17
(11)
2
11
(12)
19
2
(13)
23
17
(14)
17
7
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
23
7
23
7
×
161
=
=
7
7
×
7
(2)
23
5
23
5
×
115
=
=
5
5
×
5
(3)
7
5
7
5
×
35
=
=
5
5
×
5
(4)
23
17
23
17
×
391
=
=
17
17
×
17
(5)
11
2
11
2
×
22
=
=
2
2
×
2
(6)
7
3
7
3
×
21
=
=
3
3
×
3
(7)
13
3
13
3
×
39
=
=
3
3
×
3
(8)
11
13
11
13
×
143
=
=
13
13
×
13
(9)
19
5
19
5
×
95
=
=
5
5
×
5
(10)
5
17
5
17
×
85
=
=
17
17
×
17
(11)
2
11
2
11
×
22
=
=
11
11
×
11
(12)
19
2
19
2
×
38
=
=
2
2
×
2
(13)
23
17
23
17
×
391
=
=
17
17
×
17
(14)
17
7
17
7
×
119
=
=
7
7
×
7