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

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

Archive

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