The size of an A4 sheet of paper is 210mm × 297mm.
297/210 = 1.4142
This is a special number. Let' see:
A3 is 297×420. 210/148=1.414
A2 is 420×594. 594/420=1.4142
This true all the way up to
A0: 841×1189. 1189/841=1.414
Can you guess why?
(Answer in next tweet)
12
125
503

