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) 10, 17, -7, 24, -31 55 (Next is - of previous two)
2) 15, 11, 23, 6, 31, 1, 39, -4, 47, -9, 55 -14 (odd=seq1, even=seq2; seq1: += 8, seq2: -= 5)
3) 2, 10, -8, 18, -26 44 (Next is - of previous two)
4) 17, 19, 22, 27, 34 45 (previous + next prime number)
5) 1, 3, 6, 11, 18 29 (previous + next prime number)
6) 17, 43, 95, 199, 407 823 (2 * previous + 9)
7) 1, 2, 6, 15, 31 56 (previous + ^2 of place in sequence)
8) 2, 0, -8, -40, -168 -680 (4 * previous - 8)
9) 7, 3, 12, 9, 17, 15, 22, 21, 27, 27, 32 33 (odd=seq1, even=seq2; seq1: += 5, seq2: += 6)
10) 8, 10, 11, 5, 14, 0, 17, -5, 20, -10, 23 -15 (odd=seq1, even=seq2; seq1: += 3, seq2: -= 5)
11) 1, 2, 6, 15, 31 56 (previous + ^2 of place in sequence)
12) 15, 17, 20, 25, 32 43 (previous + next prime number)
13) 2, 4, 7, 12, 19 30 (previous + next prime number)
14) 6, 32768, 14, 12, 4096, 8, 24, 512, 2, 48, 64, -4, 96, 8, -10, 192, 1 -16 (seq1, seq2, seq3...; seq1: *= 2, seq2: /= 8, seq3: -= 6)
15) 10, 24, 66, 192, 570 1704 (3 * previous - 6)
16) 3, 12, 15, 27, 42 69 (Next is + of previous two)
17) 14, 5, 13, 12, 12, 19, 11, 26, 10, 33, 9 40 (odd=seq1, even=seq2; seq1: -= 1, seq2: += 7)
18) 17, 36, 74, 150, 302 606 (2 * previous + 2)
19) 4, 10, 10, 12, 50, 16, 36, 250, 22, 108, 1250, 28, 324, 6250, 34, 972, 31250 40 (seq1, seq2, seq3...; seq1: *= 3, seq2: *= 5, seq3: += 6)
20) 13, 14, 18, 27, 43 68 (previous + ^2 of place in sequence)
21) 16, 14, 54432, 18, 9, 9072, 20, 4, 1512, 22, -1, 252, 24, -6, 42, 26, -11 7 (seq1, seq2, seq3...; seq1: += 2, seq2: -= 5, seq3: /= 6)
22) 12, -1, 98304, -96, -7, -12288, -768, -49, -1536, -6144, -343, -192, -49152, -2401, -24, -393216, -16807 -3 (seq1, seq2, seq3...; even index has - before it; seq1: *= 8, seq2: *= 7, seq3: /= 8)
23) 15, 17, 20, 25, 32 43 (previous + next prime number)
24) 4, 5, 9, 18, 34 59 (previous + ^2 of place in sequence)
25) 2, 16, 15, 16, 18, 10, 128, 20, 5, 1024, 22, 0, 8192, 24, -5, 65536, 26 -10 (seq1, seq2, seq3...; seq1: *= 8, seq2: += 2, seq3: -= 5)


Quick links:

Practice: Easy | Medium | Hard | Hard + non math
Customized