mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2023

24 December

When written in binary, the number 235 is 11101011. This binary representation starts and ends with 1 and does not contain two 0s in a row.
What is the smallest three-digit number whose binary representation starts and ends with 1 and does not contain two 0s in a row?

Show answer

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2025