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Top Questions
71
votes
Could the observable universe be bigger than the universe?
cosmology
universe
observable-universe
asked Mar 14, 2021 at 21:06
physics.stackexchange.com
51
votes
Six pyramids in a cube
mathematics
geometry
no-computers
three-dimensional
asked Oct 24, 2017 at 21:56
puzzling.stackexchange.com
16
votes
"Musical chair" for clock hands
mathematics
probability
time
asked Dec 23, 2017 at 11:38
puzzling.stackexchange.com
15
votes
The Lazy Laser Physicist
visual
geometry
physics
asked Jan 1, 2019 at 21:34
puzzling.stackexchange.com
14
votes
Create a 1 meter measure
geometry
optimization
construction
paper-folding
asked Oct 29, 2017 at 20:35
puzzling.stackexchange.com
13
votes
Multibranched tree
mathematics
no-computers
graph-theory
asked Nov 2, 2017 at 23:31
puzzling.stackexchange.com
13
votes
Make 2008 from Φ (Golden Ratio)
mathematics
formation-of-numbers
asked Jan 21, 2018 at 20:41
puzzling.stackexchange.com
13
votes
Digit sums of successive integers
mathematics
no-computers
number-theory
asked Jan 7, 2019 at 21:18
puzzling.stackexchange.com
12
votes
Pucks in the arena
mathematics
logical-deduction
geometry
physics
asked Feb 3, 2019 at 21:36
puzzling.stackexchange.com
12
votes
Why do dental drills need such high rpm?
classical-mechanics
rotational-dynamics
solid-state-physics
friction
technology
asked Oct 26, 2020 at 20:01
physics.stackexchange.com
1
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Top Answers
25
68 coins with 100 weighings
puzzling.stackexchange.com
25
Integers around a circle with consecutive pairs adding to a square
puzzling.stackexchange.com
20
What happens to the non-axial photons of a laser cavity?
physics.stackexchange.com
17
How can you get 125 from 2,3,4,5,6?
puzzling.stackexchange.com
17
The three utilities puzzle
puzzling.stackexchange.com
15
How many lemons?
puzzling.stackexchange.com
15
The Lazy Laser Physicist
puzzling.stackexchange.com
13
Ray reflection inside the cube
puzzling.stackexchange.com
11
Help me unlock my bike
puzzling.stackexchange.com
11
How much money can we make?
puzzling.stackexchange.com
10
Radar towers in a military field
puzzling.stackexchange.com
10
Can a group of electrons act as one and deflect a photon as a group?
physics.stackexchange.com
10
Easy Riddles #5: What thing am I?
puzzling.stackexchange.com
10
Breaking Balance (Part C)
puzzling.stackexchange.com
9
Polarizing Encryption: What does it say?
puzzling.stackexchange.com
9
How many Christmas Trees?
puzzling.stackexchange.com
9
Answer is three words forming a phrase (3rd of a rebus series)
puzzling.stackexchange.com
8
Drawing balls from a pocket
puzzling.stackexchange.com
7
Three baskets with numbered balls
puzzling.stackexchange.com
7
Make 2008 from Φ (Golden Ratio)
puzzling.stackexchange.com
7
Breaking Balance (Part A)
puzzling.stackexchange.com
7
Determine a polynomial with nonnegative integer coefficients with minimum queries
puzzling.stackexchange.com
6
Gaining some intuition for thermal sources producing photon bunching
physics.stackexchange.com
6
Why is it difficult to obtain a strictly monochromatic light of a single wavelength?
physics.stackexchange.com
6
Mr.Q : Make rainbow
puzzling.stackexchange.com
6
Breaking Balance (Part A)
puzzling.stackexchange.com
5
Is there an equivalence between the creation of a wavefunction and the collapse of a wavefunction?
physics.stackexchange.com
5
Why does audio signal amplitude always fall off at higher frequencies?
physics.stackexchange.com
5
Fibonacci Decimals and their Sums
puzzling.stackexchange.com
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