mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

121

Find a number base other than 10 in which 121 is a perfect square.

Show answer & extension

Tags: numbers, bases
If you enjoyed this puzzle, check out Sunday Afternoon Maths XLIV,
puzzles about bases, or a random puzzle.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2020

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2021