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lithiumdeuteride
Lv 7
lithiumdeuteride asked in Science & MathematicsMathematics · 1 decade ago

Challenge question: Number sequences!?

Here are some number sequences I thought up. See if you can find the next number, and also identify the pattern.

Sequence 1:

1, 3, 4, 7, 6, 12, 8, 15, 13, ?

Sequence 2:

100, 19, 83, 34, 70, 45, ?

Sequence 3:

1, 1, 0, -1, 0, 7, 28, 79, 192, ?

Sequence 4:

2, 5, 10, 17, 28, 41, 58, 77, 100, ?

The numbers in the sequence may or may not depend on the previous number.

2 Answers

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  • tsr21
    Lv 6
    1 decade ago
    Favorite Answer

    S2: 61

    S4: 129

    S1: 18

    S3: 431

  • whitesox09
    Lv 7
    1 decade ago

    Sequence 4

    Next term would be 129

    The formula is a[n+1] = a[n] + p[n], where p is the set of all prime numbers

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