User user2023861 - Mathematics Stack Exchange

user2023861

Member for 9 years, 3 months
Last seen more than 1 year ago

19 Answers

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14 votes

Accepted

How many different ways can I get up a flight (of stairs) with 11 steps?

answered Nov 20, 2015 at 19:17

7 votes

Baffled by resolving number list

answered Sep 17, 2014 at 14:34

4 votes

Intuitively, why does Bayes' theorem work?

answered Sep 16, 2015 at 15:14

3 votes

Prove that $1 + 4 + 7 + · · · + 3n − 2 = \frac {n(3n − 1)}{2}$

answered Dec 4, 2014 at 13:32

3 votes

If both $a,b>0$, then $a^ab^b \ge a^bb^a$

answered Dec 11, 2014 at 21:09

2 votes

An easy way to remember PEMDAS

answered Oct 21, 2015 at 14:25

2 votes

$21$ balls in a bag - Probability

answered Jan 27, 2016 at 21:57

1 vote

Interesting Question on Ants

answered Nov 24, 2014 at 21:43

1 vote

Can someone help me on this probability question please?

answered Dec 31, 2015 at 20:36

1 vote

Probability: 3 balls, 2 Urns

answered Dec 3, 2015 at 17:16

1 vote

probability that a sum of 3 is rolled before a sum of 5 is rolled in a sequence of rolls of the dice from a four sided die.

answered Nov 2, 2015 at 14:32

1 vote

Accepted

binomial problem : Executive Airlines

answered Oct 12, 2015 at 20:23

1 vote

Probability that the sum of three integer numbers (from 1 to 100) is more than 100

answered Oct 1, 2014 at 16:24

1 vote

Caden has 4/3 kg of sand which fills 2/3 of his bucket. How many buckets will 1kg sand fill?

answered Apr 16, 2015 at 14:44

0 votes

Computing the integral $\int_{-1}^{2} \left( |x| + |1-x| \right) {\rm d} x$

answered Aug 10, 2015 at 15:29

0 votes

Simple Trig Equations - Why is it Wrong to Cancel Trig Terms?

answered Sep 1, 2015 at 13:25

0 votes

Disproving existence of real root in some interval for a quintic equation

answered Nov 12, 2014 at 19:14

0 votes

Solving $2^{2x+1} - 2^{x+4} = 2^3 - 2^x$

answered Jan 7, 2015 at 15:26

0 votes

Ordinary differential equation with Boundary value conditions

answered Jan 8, 2015 at 22:09