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# 72 Questions

3
21
votes
3
answers
771
views

11
18
votes
1
answer
315
views

3
10
votes
2
answers
193
views

2
9
votes
1
answer
2k
views

3
9
votes
0
answers
127
views

### For primes $P_1$ and $P_2$, exists a prime $P_3$ that both $P_i + 6P_3$ is a prime

oct 24 '13 at 20:48 Valtteri 1,400

9
votes
3
answers
279
views

2
7
votes
1
answer
209
views

1
6
votes
2
answers
419
views

5
votes
0
answers
65
views

### A “trick” with a deck of cards, probability of equal result

jun 10 at 15:07 Valtteri 1,400
2
5
votes
1
answer
211
views

5
votes
1
answer
166
views

4
votes
1
answer
152
views

4
votes
2
answers
165
views

1
4
votes
1
answer
404
views

1
4
votes
1
answer
124
views

1
3
votes
1
answer
62
views

1
3
votes
0
answers
50
views

### Formula for numbers whose iterated distance from next square has fixed point $2$

dec 30 '14 at 0:36 Valtteri 1,400

3
votes
0
answers
31
views

### Properties of digit functions for numbers in $[0,1]$

nov 6 '14 at 23:23 Valtteri 1,400

3
votes
0
answers
55
views

### Naming elements of a group

may 27 '14 at 13:55 Valtteri 1,400

3
votes
1
answer
47
views

3
votes
1
answer
59
views

3
votes
1
answer
52
views

3
votes
2
answers
145
views

1
2
votes
1
answer
148
views

1
2
votes
0
answers
36
views

### Factorization by multiplying and representation as difference of two squares

jun 8 '15 at 22:28 Valtteri 1,400
1
2
votes
2
answers
269
views

1
2
votes
2
answers
154
views

2
votes
2
answers
128
views

2
votes
2
answers
87
views

2
2
votes
1
answer
168
views