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) 10, 31, 115, 451, 1795 7171 (4 * previous - 9)
2) 12, 14, 17, 22, 29 40 (previous + next prime number)
3) 12, 14, 17, 22, 29 40 (previous + next prime number)
4) 2, 2, -7, -2, -16, -6, -25, -10, -34, -14, -43 -18 (odd=seq1, even=seq2; seq1: -= 9, seq2: -= 4)
5) 6, 8, -2, 10, -12 22 (Next is - of previous two)
6) 1, 9, -2, 11, -5, 13, -8, 15, -11, 17, -14 19 (odd=seq1, even=seq2; seq1: -= 3, seq2: += 2)
7) 14, 16, 19, 24, 31 42 (previous + next prime number)
8) 4, 132192, 9, 22032, 14, 3672, 19, 612, 24, 102, 29 17 (odd=seq1, even=seq2; seq1: += 5, seq2: /= 6)
9) 4, 8, -4, 12, -16 28 (Next is - of previous two)
10) 10, 11, 15, 24, 40 65 (previous + ^2 of place in sequence)
11) 14, 15, 19, 28, 44 69 (previous + ^2 of place in sequence)
12) 4, 6, 9, 14, 21 32 (previous + next prime number)
13) 6, 11, -5, 16, -21 37 (Next is - of previous two)
14) 1, 11, 51, 211, 851 3411 (4 * previous + 7)
15) 3, 10, -7, 17, -24 41 (Next is - of previous two)
16) 8, 10, 13, 18, 25 36 (previous + next prime number)
17) 10, 15, 19, 9, 28, 3, 37, -3, 46, -9, 55 -15 (odd=seq1, even=seq2; seq1: += 9, seq2: -= 6)
18) 2, 5, 7, 12, 19 31 (Next is + of previous two)
19) 5, 7, 10, 15, 22 33 (previous + next prime number)
20) 1, 2, 6, 15, 31 56 (previous + ^2 of place in sequence)
21) 6, 19, 45, 97, 201 409 (2 * previous + 7)
22) 1215, 31250, 405, 6250, 135, 1250, 45, 250, 15, 50, 5 10 (odd=seq1, even=seq2; seq1: /= 3, seq2: /= 5)
23) 11, 23, 47, 95, 191 383 (2 * previous + 1)
24) 2, 2, 11, 11, 20, 20, 29, 29, 38, 38, 47 47 (odd=seq1, even=seq2; seq1: += 9, seq2: += 9)
25) 17, 19, 22, 27, 34 45 (previous + next prime number)


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