# why 64 is equal to 65 here? [duplicate]

how is this possible? I know there is some trick, should someone please explain?!

• This appeared here in a similar post using triangles rather than squares. The lesson here is that drawings are not proofs. – Asaf Karagila Oct 27 '13 at 12:00
• What program do you need to create such animations? I'd enjoy to make some animated recreational math problems... – Jeyekomon Oct 27 '13 at 12:06
• Note: 面積 = Area, 甲/乙/丙/丁 are labels. one should interpret them as A / B / C / D or $1^{st} / 2^{nd} / 3^{rd} / 4^{th}$ in this question. – achille hui Oct 27 '13 at 12:06
• – lab bhattacharjee Oct 27 '13 at 14:39