Sequence Test

Hard level

This level has harder exercises, the answers will have at at most 4 digits. If you want to select which tests are used, you can set up a custom exercise.

Scoring

You get one point for every correct answer, unlike the math test there is no negative score.

Manual

The answer to the sequenence and it's explaination will be printed right next to it in the site's background color. You can use CTRL+A, Command+A or mouse select all to show it. Custom tests will offer more control over the test.

Questions
1) 17, 32, 62, 122, 242 482 (2 * previous - 2)
2) 14, 47, 146, 443, 1334 4007 (3 * previous + 5)
3) 9, 14, 27, 22, 81, 30, 243, 38, 729, 46, 2187 54 (odd=seq1, even=seq2; seq1: *= 3, seq2: += 8)
4) 5, 3, -1, -9, -25 -57 (2 * previous - 7)
5) 3, 5, 8, 13, 20 31 (previous + next prime number)
6) 131072, 12, 16384, 3, 2048, -6, 256, -15, 32, -24, 4 -33 (odd=seq1, even=seq2; seq1: /= 8, seq2: -= 9)
7) 1, 2, 6, 15, 31 56 (previous + ^2 of place in sequence)
8) 15, 14, 16, 22, 17, 30, 18, 38, 19, 46, 20 54 (odd=seq1, even=seq2; seq1: += 1, seq2: += 8)
9) 2, 4, 7, 12, 19 30 (previous + next prime number)
10) 15, 12, 10, 30, 4, 11, 60, -4, 12, 120, -12, 13, 240, -20, 14, 480, -28 15 (seq1, seq2, seq3...; seq1: *= 2, seq2: -= 8, seq3: += 1)
11) 6, 24, 78, 240, 726 2184 (3 * previous + 6)
12) 17, -4, 2, -16, -8, -7, -15, -12, -12, -14, -16, -17, -13, -20, -22, -12, -24 -27 (seq1, seq2, seq3...; even index has - before it; seq1: -= 1, seq2: += 4, seq3: += 5)
13) 13, 18, 31, 49, 80 129 (Next is + of previous two)
14) 6, 19, 45, 97, 201 409 (2 * previous + 7)
15) 7, -458752, 10, -9, -57344, -19, -11, -7168, -28, -13, -896, -37, -15, -112, -46, -17, -14 -55 (seq1, seq2, seq3...; even index has - before it; seq1: += 2, seq2: /= 8, seq3: += 9)
16) 3, 11, 43, 171, 683 2731 (4 * previous - 1)
17) 1, 7, -6, 13, -19 32 (Next is - of previous two)
18) 9, 10, 14, 23, 39 64 (previous + ^2 of place in sequence)
19) 124416, -10, 10, -20736, -30, -20, -3456, -90, -40, -576, -270, -80, -96, -810, -160, -16, -2430 -320 (seq1, seq2, seq3...; even index has - before it; seq1: /= 6, seq2: *= 3, seq3: *= 2)
20) 14, 1, 17, 126, 7, 13, 1134, 49, 9, 10206, 343, 5, 91854, 2401, 1, 826686, 16807 -3 (seq1, seq2, seq3...; seq1: *= 9, seq2: *= 7, seq3: -= 4)
21) 2, 15, 67, 275, 1107 4435 (4 * previous + 7)
22) 14, -5, 64, -28, -11, -32, -56, -17, -16, -112, -23, -8, -224, -29, -4, -448, -35 -2 (seq1, seq2, seq3...; even index has - before it; seq1: *= 2, seq2: += 6, seq3: /= 2)
23) 9, 10, 14, 23, 39 64 (previous + ^2 of place in sequence)
24) 12, 10, 11, 15, 10, 20, 9, 25, 8, 30, 7 35 (odd=seq1, even=seq2; seq1: -= 1, seq2: += 5)
25) 3, -163840, 96, -10, -20480, -48, -17, -2560, -24, -24, -320, -12, -31, -40, -6, -38, -5 -3 (seq1, seq2, seq3...; even index has - before it; seq1: += 7, seq2: /= 8, seq3: /= 2)


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