Question

Prime of form $n^2-4$

score 2.6k · Answer 1 · 2018-06-14 10:32:46

2.6k

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Prime of form $n^2-4$

Published on 14 Jun 2018 - 10:32

score 375 · Answer 2 · 2018-06-14 14:46:41

375

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$p+1$ is divisible by $3$

Published on 14 Jun 2018 - 14:46

score 684 · Answer 3 · 2018-06-14 18:58:27

684

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sum of all even and odd positive divisors

Published on 14 Jun 2018 - 18:58

score 143 · Answer 4 · 2018-06-15 16:10:02

143

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find the maximum possible value of $n_9-n_1$

Published on 15 Jun 2018 - 16:10

score 95 · Answer 5 · 2026-03-25 22:23:32

95

Views

$3^n-1$ is divisible by $4 \implies n $ is even

Published on 25 Mar 2026 - 22:23

score 219 · Answer 6 · 2018-06-17 06:48:33

219

Views

Summation of positive odd and even integers

Published on 17 Jun 2018 - 6:48

score 151 · Answer 7 · 2018-06-17 18:01:55

151

Views

List all integers $x$ in $1\leq3 x \leq 100$

Published on 17 Jun 2018 - 18:01

score 122 · Answer 8 · 2026-03-25 22:23:58

122

Views

Condition of an integer divisible by $3$

Published on 25 Mar 2026 - 22:23

score 58 · Answer 9 · 2018-06-18 14:13:26

58

Views

Count the number of integer solutions to $(ax+b)/(cx+d) \in Z$

Published on 18 Jun 2018 - 14:13

score 58 · Answer 10 · 2018-06-18 23:09:42

58

Views

$N_k$ is the number of pairs $(a,b)$ of non-negative integers such that $ka+(k+1)b=n+1-k$. Find $N_1+N_2+\cdots N_{n+1}$.

Published on 18 Jun 2018 - 23:09

score 2.6k · Answer 11 · 2026-03-25 01:16:36

2.6k

Views

proving that the area of a 2016 sided polygon is an even integer

Published on 25 Mar 2026 - 1:16

score 70 · Answer 12 · 2018-06-19 10:23:42

70

Views

In writing integers $x_1$, $x_1+1$, $x_1+2$, $\ldots$, $x_2$ in base ten, how many characters are used?

Published on 19 Jun 2018 - 10:23

score 73 · Answer 13 · 2018-06-19 14:10:17

73

Views

find a set of integers where {$a_i + a_j | 1 \le i \le j \le n$} leave distinct remainders when divided by $n(n+1)/2$

Published on 19 Jun 2018 - 14:10

score 192 · Answer 14 · 2026-03-25 02:59:24

192

Views

Can someone walk me through this wolframalpha solution?

Published on 25 Mar 2026 - 2:59

score 53 · Answer 15 · 2018-06-21 05:16:08

53

Views

In how many ways can integers $a_1<a_2<a_3<a_4$ be chosen from the integers $1,2,3,...,26$ such that $5 \le a_i - a_{i-1} \le 7$

Published on 21 Jun 2018 - 5:16

List Question

Prime of form $n^2-4$

$p+1$ is divisible by $3$

sum of all even and odd positive divisors

find the maximum possible value of $n_9-n_1$

$3^n-1$ is divisible by $4 \implies n $ is even

Summation of positive odd and even integers

List all integers $x$ in $1\leq3 x \leq 100$

Condition of an integer divisible by $3$

Count the number of integer solutions to $(ax+b)/(cx+d) \in Z$

$N_k$ is the number of pairs $(a,b)$ of non-negative integers such that $ka+(k+1)b=n+1-k$. Find $N_1+N_2+\cdots N_{n+1}$.

proving that the area of a 2016 sided polygon is an even integer

In writing integers $x_1$, $x_1+1$, $x_1+2$, $\ldots$, $x_2$ in base ten, how many characters are used?

find a set of integers where {$a_i + a_j | 1 \le i \le j \le n$} leave distinct remainders when divided by $n(n+1)/2$

Can someone walk me through this wolframalpha solution?

In how many ways can integers $a_1<a_2<a_3<a_4$ be chosen from the integers $1,2,3,...,26$ such that $5 \le a_i - a_{i-1} \le 7$

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