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©2026 数学クラブ http://sugaku.club/
月 日（ ）
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[1P1-00]
(1)
23
3
(2)
13
5
(3)
23
17
(4)
5
7
(5)
2
19
(6)
11
2
(7)
11
17
(8)
7
17
(9)
13
5
(10)
7
23
(11)
3
17
(12)
7
23
(13)
11
2
(14)
11
5
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
23
3
23
3
×
69
=
=
3
3
×
3
(2)
13
5
13
5
×
65
=
=
5
5
×
5
(3)
23
17
23
17
×
391
=
=
17
17
×
17
(4)
5
7
5
7
×
35
=
=
7
7
×
7
(5)
2
19
2
19
×
38
=
=
19
19
×
19
(6)
11
2
11
2
×
22
=
=
2
2
×
2
(7)
11
17
11
17
×
187
=
=
17
17
×
17
(8)
7
17
7
17
×
119
=
=
17
17
×
17
(9)
13
5
13
5
×
65
=
=
5
5
×
5
(10)
7
23
7
23
×
161
=
=
23
23
×
23
(11)
3
17
3
17
×
51
=
=
17
17
×
17
(12)
7
23
7
23
×
161
=
=
23
23
×
23
(13)
11
2
11
2
×
22
=
=
2
2
×
2
(14)
11
5
11
5
×
55
=
=
5
5
×
5