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) 7, 17, 47, 137, 407 1217 (3 * previous - 4)
2) 11, 12, 16, 25, 41 66 (previous + ^2 of place in sequence)
3) 1, 65536, 2, 8192, 3, 1024, 4, 128, 5, 16, 6 2 (odd=seq1, even=seq2; seq1: += 1, seq2: /= 8)
4) 9, 10, 14, 23, 39 64 (previous + ^2 of place in sequence)
5) 6, 20, 62, 188, 566 1700 (3 * previous + 2)
6) 9, 4, 7, 8, 5, 12, 3, 16, 1, 20, -1 24 (odd=seq1, even=seq2; seq1: -= 2, seq2: += 4)
7) 12, 39, 147, 579, 2307 9219 (4 * previous - 9)
8) 13, 40, 121, 364, 1093 3280 (3 * previous + 1)
9) 16, 18, 21, 26, 33 44 (previous + next prime number)
10) 708588, 7, 78732, 14, 8748, 28, 972, 56, 108, 112, 12 224 (odd=seq1, even=seq2; seq1: /= 9, seq2: *= 2)
11) 84035, 9, 12005, 18, 1715, 36, 245, 72, 35, 144, 5 288 (odd=seq1, even=seq2; seq1: /= 7, seq2: *= 2)
12) 14, 49, 154, 469, 1414 4249 (3 * previous + 7)
13) 46656, 3, 7776, 8, 1296, 13, 216, 18, 36, 23, 6 28 (odd=seq1, even=seq2; seq1: /= 6, seq2: += 5)
14) 1215, 9, 405, 3, 135, -3, 45, -9, 15, -15, 5 -21 (odd=seq1, even=seq2; seq1: /= 3, seq2: -= 6)
15) 3, 4, 8, 17, 33 58 (previous + ^2 of place in sequence)
16) 2, 3, 7, 16, 32 57 (previous + ^2 of place in sequence)
17) 4, 23, 99, 403, 1619 6483 (4 * previous + 7)
18) 6, 10, 18, 34, 66 130 (2 * previous - 2)
19) 15, 17, 20, 25, 32 43 (previous + next prime number)
20) 1, 2, 3, 5, 8 13 (Next is + of previous two)
21) 13, 17, 30, 47, 77 124 (Next is + of previous two)
22) 9, 11, 14, 19, 26 37 (previous + next prime number)
23) 6, 7, -1, 8, -9 17 (Next is - of previous two)
24) 3, 8, 11, 19, 30 49 (Next is + of previous two)
25) 8, 10, 13, 18, 25 36 (previous + next prime number)


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