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12 questions
78\frac{7}{8}87โ
87\frac{8}{7}78โ
97\frac{9}{7}79โ
89\frac{8}{9}98โ
98\frac{9}{8}89โ
6โ (6!+5!)7!โ6!6\cdot\frac{\left(6!+5!\right)}{7!-6!}6โ 7!โ6!(6!+5!)โ
5
6
76\frac{7}{6}67โ
888
910\frac{9}{10}109โ
482482482
497497497
490490490
501501501
504504504
(12!โ6โ 10!)63โ 10!\frac{\left(12!-6\cdot10!\right)}{63\cdot10!}63โ 10!(12!โ6โ 10!)โ
1
2
3
4
7
(nโ3)!72=7!\frac{\left(n-3\right)!}{72}=7!72(nโ3)!โ=7! n = ?
9
10
11
12
13
17
18
19
20
21
68
69
70
72
73
[(xโ2)!+(2โx)!]2=?\frac{\left[\left(x-2\right)!+\left(2-x\right)!\right]}{2}=?2[(xโ2)!+(2โx)!]โ=?
0
โ1-1โ1
32\frac{3}{2}23โ
52\frac{5}{2}25โ
3nโ33n-33nโ3
3nnโ2\frac{3n}{n-2}nโ23nโ
(nโ3)3nโ1\frac{\left(n-3\right)}{3n-1}3nโ1(nโ3)โ
(nโ3)(nโ2)\frac{\left(n-3\right)}{\left(n-2\right)}(nโ2)(nโ3)โ
a11=10!\frac{a}{11}=10!11aโ=10!
130a130a130a
144a144a144a
148a148a148a
150a150a150a
168a168a168a
8
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