n
a
b
d
1
18
21
6
7
2
4
12
2
6
3
6
24
2
8
4
20
90
2
9
5
70
84
10
12
6
49
77
7
11
7
14
42
2
6
8
45
108
5
12
9
100
110
10
11
10
12
27
4
9
11
4
24
1
6
12
48
56
6
7
13
28
77
4
11
14
15
40
3
8
15
6
36
1
6
16
40
56
5
7
17
18
22
9
11
18
16
40
2
5
19
30
33
10
11
20
2
14
1
7
21
16
48
4
12
22
40
100
4
10
23
4
16
2
8
24
12
24
2
4
25
35
50
7
10
26
48
72
6
9
27
50
60
5
6
28
12
48
2
8
29
15
36
5
12
30
12
60
2
10
31
32
72
4
9
32
32
48
8
12
33
18
60
3
10
34
16
36
4
9
35
10
60
1
6
36
24
33
8
11
37
8
16
4
8
38
7
28
1
4
39
5
10
1
2
40
16
56
2
7
41
6
42
1
7
42
16
24
4
6
43
63
90
7
10
44
33
36
11
12
45
12
21
4
7
46
45
50
9
10
47
14
63
2
9
48
64
96
8
12
49
54
66
9
11
50
8
14
4
7
51
14
49
2
7
52
18
66
3
11
53
30
66
5
11
54
24
72
3
9
55
6
72
1
12
56
20
40
4
8
©Ms. Garcia Math
Name:
ID:
Quiz:
Grade:
Find the missing number in the given proportions
?
Cross multiply
Solve for the variable
Verify your answer
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