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 2023

Advent calendar 2022

Advent calendar 2021

Advent calendar 2020


List of all puzzles

Tags

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

Archive

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