mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

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

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

Archive

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