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Notable Question

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earned this badge 12 times.

Simplify $(A - (A ∪ B)) ∩ (B - (A ∩ B))$

Awarded Oct 21 at 3:48

Explicit formula for $e_k = 4e_{k-1} + 5$

Awarded Mar 25, 2022 at 4:57

Prove $n^3 + 7n + 3$ is divisible by 3 for all integers n ≥ 0

Awarded Mar 22, 2021 at 1:41

Is this a valid proof of "For all integers m and n, if mn is even, then m is even, or n is even"?

Awarded Dec 13, 2020 at 0:32

Is this a valid proof of "a, b are rational, b ≠ 0, r is irrational, then a + br is irrational"

Awarded Oct 21, 2020 at 16:15

Is a graph with four vertices of degrees 1, 2, 3, and 3 possible?

Awarded May 9, 2020 at 19:46

How many integers from 1 through 100 are neither multiples of 2 nor multiples of 9?

Awarded Sep 3, 2019 at 18:00

For all sets A and B, if A ⊆ B, then A ∪ B ⊆ B

Awarded Oct 22, 2018 at 15:50

Prove for all integers n such that n ≥ 3, $ 4^3 + 4^4 + 4^5 … 4^n = \frac{4(4^n - 16)}{3}$

Awarded Aug 10, 2018 at 12:05

How to raise a fraction to a fractional exponent?

Awarded Jan 4, 2018 at 23:13

How many distinguishable ways can the letters of the word MATHEMATICS be arranged in order? [duplicate]

Awarded Nov 28, 2017 at 4:54

Is $[p \land (p \to q)] \to q$ a tautology?

Awarded Jan 14, 2016 at 21:57

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