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Vinyl_cape_jawa
  • Member for 10 years, 1 month
  • Last seen more than a month ago
23 votes
Accepted

How many permutations are there for the letters in the word "meеt"?

20 votes
Accepted

A quick way, say in a minute, to deduce whether $1037$ is a prime number

10 votes
Accepted

Is "$f$" the function or is "$f(x)$" the function?

8 votes

Is the percentage symbol a constant?

5 votes
Accepted

Question related to Pascal Triangles and Counting Patterns

5 votes
Accepted

The equation: 18 ÷ 3 ( 5 - 4 + 1 ) = 3 or 12? (order of operation)

5 votes
Accepted

What do the small numbers/letters in a math or science formula mean???

4 votes

Number of binary sequences with no consecutive ones.

3 votes
Accepted

Trigonometric identity equation

3 votes
Accepted

Why $p$ divides a certain combination? (related to Fermat's Little Theorem)

3 votes

Confusing symbols

3 votes
Accepted

Exponent Law: Negative Exponents Division

3 votes

Prove that every even perfect number is a triangular number.

3 votes

Six real numbers so that product of any five is the sixth one

3 votes

How many ways are there to delete characters from a 10-character string?

2 votes

Number of possible combinations which sum to X using only y specific numbers

2 votes

Prove that if $a \equiv b\pmod m \land n\mid m \land n>0 \Rightarrow a \equiv b \pmod n$

2 votes

Multiplication with negative multiplier

2 votes
Accepted

Is there any prime number $a$ satisfying $a=\frac{k_1-k_2}{k_1-bk_2}$?

2 votes

Prove that if $t$ is a root of $f(x)$, then $t^2$ is a root of $f(x)$, where $f(x)=x^n+x^{n-1}+\cdots+x+1 \in \Bbb{Z}_2[x]$

2 votes

$100$ birds in $21$ cages each with $≤ 10$, with least cages having $≥ 4$ birds?

2 votes

3 different math books, 2 different physics books are arranged on a bookshelf. In how many ways can they be arranged if no 2 math books are together?

2 votes

Why does this relation fail symmetry and transitivity properties?

2 votes

How is this property called for mod?

2 votes

Prove that any number that is not a power of 2 can be expressed as a sum of two or more consecutive positive integers

2 votes

How does the ring $\mathbb R[x] / (x^2 - 1)$ work?

2 votes

$G=\big<a, b: a^4=1=b^2 \quad and\quad ab=ba^{-1}\big>$ How can we know $ba^2=a^2b$ $\quad$and $ba^3=a^2ba?$

2 votes

Confused between if-then (→) and iff (↔)

2 votes

Sum of certain consecutive numbers is $1000$.

2 votes

Proving the context of the formula $\frac{k!}{k_1!\cdot k_2!...k_n!}$ - Need help to understand the context

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