mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

2 December

In a week (Monday 12:01 to Monday 12:01 a week later), how many times will the minute hand of an analogue clock point in the same direction as the hour hand?

Show answer

Tags: clocks, time

Ticking clock

Is there a time of day when the hands of an analogue clock (one with a second hand that moves every second instead of moving continuously) will all be 120° apart?

Show answer & extension

Tags: angles, time

8! minutes

How many weeks are there in 8! (\(8\times 7\times 6\times 5\times 4\times 3\times 2\times 1\)) minutes?

Show answer & extension

Tags: numbers, time

Burning ropes

You have two ropes and some matches. Each rope, if lit at its end, will burn for 60 minutes. But the rate of burning is not regular, so cutting a rope in half doesn't result in a burn time of 30 minutes.
How can you use the ropes to time exactly 45 minutes?

Show answer & extension

Tags: time

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021

Advent calendar 2020


List of all puzzles

Tags

factors planes spheres axes addition crossnumber sequences differentiation logic combinatorics folding tube maps wordplay sets coins geometry prime numbers irreducible numbers advent circles proportion products lines means square roots percentages consecutive integers indices christmas even numbers grids triangles decahedra parabolas division gerrymandering money volume dodecagons polygons scales probability chalkdust crossnumber clocks games squares perfect numbers rugby consecutive numbers chocolate routes cards probabilty tournaments 2d shapes remainders odd numbers sums crossnumbers digital clocks crosswords taxicab geometry perimeter symmetry coordinates the only crossnumber speed tiling sport range median geometric mean menace shape dice integers people maths area regular shapes time cubics cube numbers dates calculus averages unit fractions binary surds angles multiplication integration rectangles tangents cryptic crossnumbers dominos multiples geometric means cryptic clues square numbers bases colouring palindromes albgebra quadratics quadrilaterals triangle numbers ellipses pascal's triangle complex numbers 3d shapes arrows number star numbers functions algebra ave polynomials chess graphs determinants elections digital products balancing expansions matrices doubling shapes fractions books factorials digits trigonometry numbers partitions floors pentagons sum to infinity hexagons mean

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2024