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global05
  • Member for 2 years, 10 months
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5 votes
1 answer
286 views

Two players put fill $1$ and $0$ in a $3\times 3$ matrix and compute its determinant when it is full. Can Player $0$ win if $1$ starts at the center?

5 votes
3 answers
1k views

Calculating $\phi(100)$ where $\phi$ is the totient function

4 votes
4 answers
453 views

$3^{123} \mod 100$

4 votes
1 answer
141 views

Arrange 6 fruits from three identical watermelons, three identical bananas and three identical strawberries.

2 votes
2 answers
49 views

Find the ratio of the lengths PX and ZY.

2 votes
2 answers
37 views

Rhombus Identification: 3 sides equal + 2 parallel sides?

2 votes
3 answers
617 views

Determinant Tic Tac Toe Part 2

1 vote
1 answer
772 views

Combinatorics floral arrangement question

1 vote
3 answers
12k views

Prove that if a ≡ b mod m and c ≡ d mod m, then ac ≡ bd mod m. [duplicate]

1 vote
0 answers
512 views

Roll a ball Combinatorics Question

1 vote
4 answers
1k views

Check this proof: If two columns/rows of a matrix are the same, the determinant is $0$.

1 vote
2 answers
691 views

Number of $3$-digit numbers with strictly increasing digits

0 votes
1 answer
176 views

Combinatorics: Three letters are to be selected from the letters in the word questions...

0 votes
4 answers
195 views

Explain and Apply Euler's Generalisation of Fermat's Theorem

0 votes
3 answers
174 views

Dimensions Pythagoras Problem Solving Question

0 votes
2 answers
962 views

Motel Probability and Combinatorics Questions

0 votes
4 answers
93 views

$A$ could've done a job in 6 hours longer, $B$ in 15 hours longer and $C$ in twice the time needed if they work together. How long together?

-1 votes
3 answers
113 views

Best method to find how many solutions are there to the equation $a + b + c = 21?$

-1 votes
3 answers
61 views

Consider the sets X = {a, b, c} and Y = {1, 2}. How many functions are there with domain X and codomain Y?