Sequence Test

Medium level

This level has medium hard exercises; this is harder than the basic because the answers will have 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) 12, 13, 25, 38, 63 101 (Next is + of previous two)
2) 10, 11, -1, 12, -13 25 (Next is - of previous two)
3) 6, 7, 11, 20, 36 61 (previous + ^2 of place in sequence)
4) 2, 2430, -4, 810, -10, 270, -16, 90, -22, 30, -28 10 (odd=seq1, even=seq2; seq1: -= 6, seq2: /= 3)
5) 262144, 491520, 32768, 61440, 4096, 7680, 512, 960, 64, 120, 8 15 (odd=seq1, even=seq2; seq1: /= 8, seq2: /= 8)
6) 12, 14, -2, 16, -18 34 (Next is - of previous two)
7) 2, 9, -7, 16, -23 39 (Next is - of previous two)
8) 15, 14, 75, 7, 375, 0, 1875, -7, 9375, -14, 46875 -21 (odd=seq1, even=seq2; seq1: *= 5, seq2: -= 7)
9) 11, 12, -1, 13, -14 27 (Next is - of previous two)
10) 12, 16, 24, 40, 72 136 (2 * previous - 8)
11) 11, 14, 25, 39, 64 103 (Next is + of previous two)
12) 16, 22, 38, 60, 98 158 (Next is + of previous two)
13) 4, 6, 9, 14, 21 32 (previous + next prime number)
14) 118098, 15, 13122, 20, 1458, 25, 162, 30, 18, 35, 2 40 (odd=seq1, even=seq2; seq1: /= 9, seq2: += 5)
15) 9, 16, 14, 20, 19, 24, 24, 28, 29, 32, 34 36 (odd=seq1, even=seq2; seq1: += 5, seq2: += 4)
16) 7, 24, 92, 364, 1452 5804 (4 * previous - 4)
17) 11, 12, 16, 25, 41 66 (previous + ^2 of place in sequence)
18) 12, 15, 27, 42, 69 111 (Next is + of previous two)
19) 16, 4, 48, 16, 144, 64, 432, 256, 1296, 1024, 3888 4096 (odd=seq1, even=seq2; seq1: *= 3, seq2: *= 4)
20) 11, 10, 18, 14, 25, 18, 32, 22, 39, 26, 46 30 (odd=seq1, even=seq2; seq1: += 7, seq2: += 4)
21) 10, 12, 15, 20, 27 38 (previous + next prime number)
22) 11, 25, 53, 109, 221 445 (2 * previous + 3)
23) 14, 16, 19, 24, 31 42 (previous + next prime number)
24) 11, 35, 131, 515, 2051 8195 (4 * previous - 9)
25) 12, 17, 29, 46, 75 121 (Next is + of previous two)


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