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©2025 数学クラブ http://sugaku.club/
月 日（ ）
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[1P1-00]
(1)
23
13
(2)
23
7
(3)
7
11
(4)
2
11
(5)
7
2
(6)
11
23
(7)
19
5
(8)
3
23
(9)
5
19
(10)
23
17
(11)
17
23
(12)
7
17
(13)
17
13
(14)
7
3
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
23
13
23
13
×
299
=
=
13
13
×
13
(2)
23
7
23
7
×
161
=
=
7
7
×
7
(3)
7
11
7
11
×
77
=
=
11
11
×
11
(4)
2
11
2
11
×
22
=
=
11
11
×
11
(5)
7
2
7
2
×
14
=
=
2
2
×
2
(6)
11
23
11
23
×
253
=
=
23
23
×
23
(7)
19
5
19
5
×
95
=
=
5
5
×
5
(8)
3
23
3
23
×
69
=
=
23
23
×
23
(9)
5
19
5
19
×
95
=
=
19
19
×
19
(10)
23
17
23
17
×
391
=
=
17
17
×
17
(11)
17
23
17
23
×
391
=
=
23
23
×
23
(12)
7
17
7
17
×
119
=
=
17
17
×
17
(13)
17
13
17
13
×
221
=
=
13
13
×
13
(14)
7
3
7
3
×
21
=
=
3
3
×
3