5, 12, ?, 41, 87, 214
5+7 = 12
12+(7+3=10) =22
22+(10+9=19) = 41
41+(19+27=46) = 87
87+(46+81=127) = 214
14, ?, 13, 17.5, 21.75
14/2 + 5 = 12
12/2 +7 = 13
13/2 + 11= 17.5
17.5/2+13 = 21.75
15, 5, 4.5, 5.8.7.9, ?
15*0.2 +2 = 5
5*0.3+3 = 4.5
4.5*0.4+4 = 5.8
5.8*0.5+5 =7.9
7.9*0.6+6 = 10.74
107, 106, 52, 16.3 , ?
107-1/1 = 106
106-2/2 = 52
52-3/3 = 16.3
16.3-4/4 = 3.075
29, ?, 79, 131, 201
29+(18*1-2) = 29+16 = 45
45+(18*2-2) = 45+34 = 79
79+(18*3-2) = 79+52 = 131
131+(18*4-2) = 131+70 = 201
?, 6, 10.5, 23, 60
9*0.5+0.5 = 5
5*1+1 = 6
6*1.5+1.5 = 10.5
10.5*2+2 = 23
23*2.5+2.5 = 60
211, 90, 171, 122, 147, 138, ?
211-112 = 90
90+92 = 171
171-72 = 122
122+52 = 147
147-32 = 138
138+12 = 139
1256, 318, ?, 163, 328, 86
1256/4 =314+4 = 318
318*2 = 636+2 = 638
638/4 = 159+4 = 163
163*2 =326+2 = 328
328/4 = 82+4 = 86
37, 54, 88, ?, 207
37+17 = 54
54+2*17 = 88
88+3*17 =139
139+4*17 = 207
13, 29, 48, 70, 95, ?
13+(9+7) = 29
29+(9+10) = 48
48+(9+13) =70
70+(9+16) = 95
95+(9+19) = 123
2, 3, 6, 14, ?, 115.5
2 * 1 + 1 = 3
3 * 1.5 + 1.5= 6
6 * 2 + 2 = 14
14 * 2.5 + 2.5 = 37.5
37.5 * 3 + 3 = 115.5
12 13 28 85 ? 1711
12*1 – 1 + 2 = 13
13*2 – 2 + 4 = 28
28*3 – 1 + 2 = 85
85*4 – 2 + 4 = 342
342*5 – 1 + 2 = 1711
3, 5, 10, ?, 92, 349
3 + 1² + 1 = 5
5 + 2² + 1 = 10
10 + 4² + 1 = 27
5, 8, 15, 37, ?, 309.5
5 * 1 + 2 + 1 = 8
8 * 1.5 + 4 – 1 = 15
15 * 2 + 6 + 1 = 37
37 * 2.5 + 8 – 1 = 99.5
99.5 * 3 + 10 + 1 = 309.5
3, ?, 13, 39, 87, 169
3 + 1² + 1= 5
5 + 3² – 1= 13
13 + 5² + 1= 39……..
6, 7, 16, ?, 218, 1099
6*1 – 1 + 2 = 7
7*2 – 2 + 4 = 16
16*3 – 1 + 6 = 53
3, 2, 14, 35, 107, ?
3 + 1³ – 2 = 2
2 + 2³ + 4 = 14
14 + 3³ – 6 = 35
35 + 4³ + 8 = 107
1, 3, 15, 55, ?, 899
1 * 4 – 1 = 3
3 * 4 + 3 = 15
15 * 4 – 5 = 55
55 * 4 + 7 = 227
227 * 4 – 9 = 899
2, ?, 8, 10, 28, 46
2*2 – 2 = 2
2*2 + 4 = 8
8*2 – 6 = 10
4, 6, 6, 8, 112, ?
4 * 1 + 2 = 6
6 * 2 – 4 = 8
8 * 3 + 6 = 30
30 * 4 – 8 = 112
112 * 5 + 10 = 570
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