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50 votes

4,4,2,6,2,10,4,_ sequence from 4th grade packet

Same answer as PDT, just explained differently:
Will.Octagon.Gibson's user avatar
31 votes
Accepted

A number sequence in disguise

The number that should replace the question mark is: Because: About four lines down...
codewarrior0's user avatar
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23 votes
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A symmetrical number sequence

The answer is:
M Oehm's user avatar
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16 votes
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Self-referential sequence that is sometimes powers of two

The sequence is defined as: For example, This explains the note that we the sequence can't start with two of the same number because To answer the questions: What comes after $115$ in the second ...
xnor's user avatar
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15 votes
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What is the earliest 2024 can appear in an S-sequence?

The best that I have done is as follows I think this is the best as
hexomino's user avatar
  • 137k
15 votes

List Roman numerals to minimize total distance

The minimum possible total is: This is because This minimum is achievable using the following pattern to get from The full list looks like (reading left to right, top to bottom)
Toffee's user avatar
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14 votes

Find the pattern of the sequence of prime numbers 17 23 5 1013 2027 13

These are The next number is:
sarsaparilla's user avatar
  • 6,338
14 votes
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4,4,2,6,2,10,4,_ sequence from 4th grade packet

I think the answer is Reason
PDT's user avatar
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13 votes
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A very presentable number sequence

I think the answer is (as mentioned in the comments) And the sequence is what you would expect But what is this sequence?
hexomino's user avatar
  • 137k
13 votes
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Numeric progressive matrix: 2-7-5, 2-3-4, 10-21-?

It seems like
Alaiko's user avatar
  • 6,667
13 votes

2759, 4248, 1152,?

Well this was way easier than I initially thought: Answer is: Logic
PDT's user avatar
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12 votes
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Arithmetic-progression-free sequences

In the comments here https://mathoverflow.net/questions/375602/analogue-to-szemer%C3%A9dis-theorem-for-non-monotone-sequences I find the following construction: Consider all the at-most-k-bit binary ...
Gareth McCaughan's user avatar
11 votes

Arithmetic-progression-free sequences

Another way to construct arbitrarily large sequences with the property: A small example is easily constructed (The sequence "1" will do). Given a permutation of 1,2,...,n without an ...
Albert.Lang's user avatar
  • 6,185
11 votes

Few enigmatic puzzles

I'm stuck on #5 and haven't been able to solve it, but here's what I got for the rest: #1 is because #2 is because #3 is because #4 is because (I'm new to Puzzling SE and not quite sure if I'm ...
spherical-wug-in-a-vacuum's user avatar
10 votes
Accepted

A healthy number sequence

The missing number is: Because these numbers are those which are also...
Stiv's user avatar
  • 145k
10 votes
Accepted

What is the next number in the following sequence: 0, 4, 8, 21, 52, 65, 96,?

The next number in the sequence is Because,
ibanezplyr's user avatar
10 votes
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2,6,?,30,-270 number sequence

I think the answer is The rule is
PDT's user avatar
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9 votes

Why do 1 and 1 complete 120, 10, 3, ?,?

Here is one possible explanation:
Lezzup's user avatar
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9 votes
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What is next letter in sequence: B, D, G, J, L, ___?

Maybe the answer is because
Greg Martin's user avatar
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8 votes

What is next letter in sequence: B, D, G, J, L, ___?

I think the next letter could be As these are Reference
hexomino's user avatar
  • 137k
8 votes
Accepted

Find the next digit in four given sequences

Answers are Explanation, those series go 2 by 2: Sequence 3 with sequence 1 Sequence 2 with sequence 4
franck vivien's user avatar
8 votes
Accepted

Number sequence puzzle: strings of 0s and 1s

I edited this to make the answer shorter and clearer Answer is Because So since Just to make things clear with a visual representation of what’s going on:
PDT's user avatar
  • 15.3k
8 votes
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Numbers turned into a number turned into numbers (start with the smallest)

I think the answer is Reasoning
hexomino's user avatar
  • 137k
7 votes

The following sequence contains a 12 somewhere

Not sure if I completely understood the puzzle. You have a sequence and are basically asking to continue the sequence, i.e. finding the rule. You already gave some clear hints... So, I guess the rule ...
theozh's user avatar
  • 1,637
7 votes
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Two number sequence puzzles

First one is Because Second one is Because Then
PDT's user avatar
  • 15.3k
7 votes
Accepted

Homemade number sequence puzzle

The missing number is: The pattern is:
Fluorine's user avatar
  • 1,202
7 votes
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Two numerical sequences

First is one is: Reason Second one is Reason
PDT's user avatar
  • 15.3k
6 votes
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Restore a once very happy sequence

This sequence is an obfuscation of a classic mathematical sequence... The numbers in this string have been obtained by... This way... The next few digits in the string must therefore be derived by ...
Stiv's user avatar
  • 145k
6 votes

icosahedral net

Solution (with touching edges highlighted): How to solve:
Beastly Gerbil's user avatar
6 votes
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Numerical sequence puzzle: 552175, 228496, 198479, 583317, 140554, 114383, 117045, ?,?

Wow I got very lucky finding this: Then So how do we work out the next two terms? Some feedback if I may:
PDT's user avatar
  • 15.3k

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