Sunday Afternoon Maths LIII

 Posted on 2016-05-29 

Lots of ones

Is any of the numbers 11, 111, 1111, 11111, ... a square number?

Show answer

An integral

Source: Alex Bolton (inspired by Book Proofs blog)
What is

Show hint

Show answer & extension

If you enjoyed these puzzles, check out Advent calendar 2019,
puzzles about ave, or a random puzzle.


Show me a random puzzle
 Most recent collections 

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2020