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Jim's user avatar
Jim
  • Member for 5 years, 11 months
  • Last seen more than a week ago
16 votes
4 answers
3k views

Why are abelian groups of interest? What is their usefulness?

6 votes
2 answers
1k views

Why multiplication of 142857 with 2,3,4,5,6 gives the same digits shifted?

3 votes
1 answer
90 views

Is this minus in the proof by substitution a typo?

3 votes
3 answers
84 views

Error in my approach to prove that $(m-1)^{m-1} \equiv m - 1 \pmod m$ using a concrete example

3 votes
2 answers
416 views

Rolling a die twice in either order with not mutual exclusive events

3 votes
1 answer
258 views

Why is CDF the only way to randomly select from samples?

3 votes
0 answers
52 views

Forming circuit with straight moves

2 votes
4 answers
2k views

Counting permutation of duplicate items

2 votes
2 answers
80 views

Why is my result not matching exactly with the solution of the problem?

2 votes
1 answer
286 views

Estimate amount spent

2 votes
1 answer
73 views

Counting chessboard rectangles

2 votes
0 answers
77 views

Use induction to prove that pegs in a line can be interchanged

2 votes
1 answer
619 views

Prove that the data given produce the fibonnaci sequence if that is indeed the solution

2 votes
0 answers
32 views

If product is multiple of a number what information can we draw? [duplicate]

2 votes
0 answers
36 views

Showing equality based on 2 equations

2 votes
2 answers
367 views

Difference of induction and divide and conquer

2 votes
1 answer
53 views

Conventions for defining inductive base case

2 votes
3 answers
305 views

Randomly choosing a number and then the dealer picks $20$ from the same set

2 votes
3 answers
78 views

Count multiples of 7 between range using positioning

2 votes
1 answer
1k views

Number of multiples of 2 or 3 in range [1,100]

2 votes
2 answers
122 views

Halving input but not at each step of a process

2 votes
2 answers
185 views

Find the number of drinking people (problem from 1544)

2 votes
3 answers
114 views

Prove multiplication closure for the sequence of 1,4,7,10....

2 votes
4 answers
691 views

Infinitely many primes of the form $6x + 5$ [duplicate]

2 votes
1 answer
334 views

Why is the radius chosen for radians?

2 votes
2 answers
256 views

Relation of totient, cycle length of multiplication and divisors

2 votes
1 answer
263 views

What is the property of co-primes that allows CRT to work?

2 votes
3 answers
220 views

square root of $1 \pmod m$ for prime $m$ and non prime $m$

2 votes
1 answer
440 views

Correct comparison of real number for n digits precision (absolute vs relative difference)

2 votes
1 answer
201 views

Wrong answers to simple trigonometry questions

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