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) 13, 14, 18, 27, 43 68 (previous + ^2 of place in sequence)
2) 3, 7, 15, 31, 63 127 (2 * previous + 1)
3) 13, 16, -3, 19, -22 41 (Next is - of previous two)
4) 11, 13, 16, 21, 28 39 (previous + next prime number)
5) 2, -256, 168070, -11, -128, -24010, -20, -64, -3430, -29, -32, -490, -38, -16, -70, -47, -8 -10 (seq1, seq2, seq3...; even index has - before it; seq1: += 9, seq2: /= 2, seq3: /= 7)
6) 17, 16, 491520, 14, 96, 61440, 11, 576, 7680, 8, 3456, 960, 5, 20736, 120, 2, 124416 15 (seq1, seq2, seq3...; seq1: -= 3, seq2: *= 6, seq3: /= 8)
7) 100842, -50421, 17, -14406, -7203, -34, -2058, -1029, -68, -294, -147, -136, -42, -21, -272, -6, -3 -544 (seq1, seq2, seq3...; even index has - before it; seq1: /= 7, seq2: /= 7, seq3: *= 2)
8) 3, 11, -8, 19, -27 46 (Next is - of previous two)
9) 6, 8, 5, 3, 4, -2, 3, -7, 2, -12, 1 -17 (odd=seq1, even=seq2; seq1: -= 1, seq2: -= 5)
10) 5, 7, 10, 15, 22 33 (previous + next prime number)
11) 1, 3, 6, 11, 18 29 (previous + next prime number)
12) 6, 7, 11, 20, 36 61 (previous + ^2 of place in sequence)
13) 4, 5, 9, 18, 34 59 (previous + ^2 of place in sequence)
14) 8, 12, 20, 32, 52 84 (Next is + of previous two)
15) 3, 5, 8, 13, 20 31 (previous + next prime number)
16) 15, 38, 107, 314, 935 2798 (3 * previous - 7)
17) 7, -84035, 11, -14, -12005, -20, -21, -1715, -29, -28, -245, -38, -35, -35, -47, -42, -5 -56 (seq1, seq2, seq3...; even index has - before it; seq1: += 7, seq2: /= 7, seq3: += 9)
18) 15, -1, 16, -12, -5, -18, -9, -9, -20, -6, -13, -22, -3, -17, -24, -0, -21 -26 (seq1, seq2, seq3...; even index has - before it; seq1: -= 3, seq2: += 4, seq3: += 2)
19) 3, 5, 8, 13, 20 31 (previous + next prime number)
20) 10, 28, 82, 244, 730 2188 (3 * previous - 2)
21) 10, 11, 21, 32, 53 85 (Next is + of previous two)
22) 13, 15, 18, 23, 30 41 (previous + next prime number)
23) 23328, -12, 7, -3888, -18, -12, -648, -24, -17, -108, -30, -22, -18, -36, -27, -3, -42 -32 (seq1, seq2, seq3...; even index has - before it; seq1: /= 6, seq2: += 6, seq3: += 5)
24) 7, 12, 19, 31, 50 81 (Next is + of previous two)
25) 17, 17, 85, 11, 425, 5, 2125, -1, 10625, -7, 53125 -13 (odd=seq1, even=seq2; seq1: *= 5, seq2: -= 6)


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