Sequence Test
Set up exercise

In practice mode the answers are selectable on the same page and no scoring will be done. In test mode you need to click a "Finished" button and your score will be calculated.

Start values
Biggest absolute number with which any + or - is done (>0).
Biggest absolute number with which any * or / is done (>1).

Answer & complexity
Guarantee for at least this many examples
(total # of digits)

Easy
Two operations, x and +/-

Medium
Mix of two operations, +, -, *, /

Hard

Specials and logic


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) 15, 17, 20, 25 32 (previous + next prime number)
2) 4, 12, 16, 28 44 (Next is + of previous two)
3) J, J, A, S, O, N D (First letters of month)
4) 10, 19, 29, 48 77 (Next is + of previous two)
5) 17, 19, 22, 27 34 (previous + next prime number)
6) 7, 12, 6, 0, 10, 8, -7, 8, 10, -14, 6, 12, -21, 4 14 (seq1, seq2, seq3...; seq1: -= 7, seq2: -= 2, seq3: += 2)
7) 5, 4, 4, 4 4 (Every term shows the number of letters in the English transcription of its number; 1, 3 (=one))
8) 16, 17, 21, 30 46 (previous + ^2 of place in sequence)
9) 7, 9, 12, 17 24 (previous + next prime number)
10) 16, -4, 9072, -19, -7, -1512, -22, -10, -252, -25, -13, -42, -28, -16 -7 (seq1, seq2, seq3...; even index has - before it; seq1: += 3, seq2: += 3, seq3: /= 6)
11) 1, 3, 6, 11 18 (previous + next prime number)
12) 16, 1116, 3116, 132116 31131216 (Every following number describes the previous one; 111221 - One 1, One 2, Two 1s )
13) 17, 20, 37, 57 94 (Next is + of previous two)
14) 5, -61440, 4, -9, -7680, -7, -13, -960, -10, -17, -120, -13, -21, -15 -16 (seq1, seq2, seq3...; even index has - before it; seq1: += 4, seq2: /= 8, seq3: += 3)
15) 7, 25, 79, 241 727 (3 * previous + 4)
16) 1, 6, 31, 156 781 (5 * previous + 1)
17) 12, 13, 17, 26 42 (previous + ^2 of place in sequence)
18) 12, 26, 54, 110 222 (2 * previous + 2)
19) 1, 6875, 7, 1375, 49, 275, 343, 55, 2401 11 (odd=seq1, even=seq2; seq1: *= 7, seq2: /= 5)
20) 4, 5, 9, 18 34 (previous + ^2 of place in sequence)
21) 11, 25, 53, 109 221 (2 * previous + 3)
22) 9, -4, 2560, -10, -16, -640, -11, -64, -160, -12, -256, -40, -13, -1024 -10 (seq1, seq2, seq3...; even index has - before it; seq1: += 1, seq2: *= 4, seq3: /= 4)
23) 1, 17, 10, -1, 24, 18, -3, 31, 26, -5, 38, 34, -7, 45 42 (seq1, seq2, seq3...; seq1: -= 2, seq2: += 7, seq3: += 8)
24) 3, 7, 10, 17 27 (Next is + of previous two)
25) 2, 2, 4, -7, 8, -16, 16, -25, 32 -34 (odd=seq1, even=seq2; seq1: *= 2, seq2: -= 9)


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