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) 13, -16, 5, -65, -144, -13, -325, -1296, -21, -1625, -11664, -29, -8125, -104976, -37, -40625, -944784 -45 (seq1, seq2, seq3...; even index has - before it; seq1: *= 5, seq2: *= 9, seq3: += 8)
2) 10, 22, 58, 166, 490 1462 (3 * previous - 8)
3) 13, 15, -2, 17, -19 36 (Next is - of previous two)
4) 16, 17, -1, 18, -19 37 (Next is - of previous two)
5) 3, 3, 3, 3, 3 3 (4 * previous - 9)
6) 98304, -16, 557056, -12288, -128, -69632, -1536, -1024, -8704, -192, -8192, -1088, -24, -65536, -136, -3, -524288 -17 (seq1, seq2, seq3...; even index has - before it; seq1: /= 8, seq2: *= 8, seq3: /= 8)
7) 15, 17, 20, 25, 32 43 (previous + next prime number)
8) 1, 3, 6, 11, 18 29 (previous + next prime number)
9) 4, 15, 59, 235, 939 3755 (4 * previous - 1)
10) 11, -100842, 1, -18, -14406, -2, -25, -2058, -4, -32, -294, -8, -39, -42, -16, -46, -6 -32 (seq1, seq2, seq3...; even index has - before it; seq1: += 7, seq2: /= 7, seq3: *= 2)
11) 4, 6, 9, 14, 21 32 (previous + next prime number)
12) 6, -2, 16384, -15, -18, -4096, -24, -162, -1024, -33, -1458, -256, -42, -13122, -64, -51, -118098 -16 (seq1, seq2, seq3...; even index has - before it; seq1: += 9, seq2: *= 9, seq3: /= 4)
13) 12, 14, 17, 22, 29 40 (previous + next prime number)
14) 8, 7, 12, -1, 16, -9, 20, -17, 24, -25, 28 -33 (odd=seq1, even=seq2; seq1: += 4, seq2: -= 8)
15) 4, 5, 9, 18, 34 59 (previous + ^2 of place in sequence)
16) 163840, 116640, 20480, 19440, 2560, 3240, 320, 540, 40, 90, 5 15 (odd=seq1, even=seq2; seq1: /= 8, seq2: /= 6)
17) 2, 5, 14, 41, 122 365 (3 * previous - 1)
18) 10, 19, 29, 48, 77 125 (Next is + of previous two)
19) 10, 1944, 4, 2, 648, 11, -6, 216, 18, -14, 72, 25, -22, 24, 32, -30, 8 39 (seq1, seq2, seq3...; seq1: -= 8, seq2: /= 3, seq3: += 7)
20) 5, 12, 33, 96, 285 852 (3 * previous - 3)
21) 7, 17, 47, 137, 407 1217 (3 * previous - 4)
22) 8, -192, 134456, -11, -96, -19208, -14, -48, -2744, -17, -24, -392, -20, -12, -56, -23, -6 -8 (seq1, seq2, seq3...; even index has - before it; seq1: += 3, seq2: /= 2, seq3: /= 7)
23) 458752, -3, 9, -57344, -4, -13, -7168, -5, -17, -896, -6, -21, -112, -7, -25, -14, -8 -29 (seq1, seq2, seq3...; even index has - before it; seq1: /= 8, seq2: += 1, seq3: += 4)
24) 4, 5, 9, 18, 34 59 (previous + ^2 of place in sequence)
25) 3, 15, 12, 7, 48, -1, 192, -9, 768, -17, 3072 -25 (odd=seq1, even=seq2; seq1: *= 4, seq2: -= 8)


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