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Question Number 43224 by tanmay.chaudhury50@gmail.com last updated on 08/Sep/18

how many square in a chess board.

$${how}\:{many}\:{square}\:{in}\:{a}\:{chess}\:{board}. \\ $$

Answered by ajfour last updated on 08/Sep/18

64+49+36+25+16+9+4+1       = ((8×9×17)/6) = 204 .

$$\mathrm{64}+\mathrm{49}+\mathrm{36}+\mathrm{25}+\mathrm{16}+\mathrm{9}+\mathrm{4}+\mathrm{1} \\ $$$$\:\:\:\:\:=\:\frac{\mathrm{8}×\mathrm{9}×\mathrm{17}}{\mathrm{6}}\:=\:\mathrm{204}\:. \\ $$

Commented by tanmay.chaudhury50@gmail.com last updated on 08/Sep/18

yes you are right  numbers of square of side a→64  nos of sauare of side 2a→49  nos of square of side 3a→36  nos of square of side 4a→25  nos of square of side 5a→16  nos of swuare of sidd 6a→9  nos of square of side 7a→4  nos of square of side 8a→1

$${yes}\:{you}\:{are}\:{right} \\ $$$${numbers}\:{of}\:{square}\:{of}\:{side}\:{a}\rightarrow\mathrm{64} \\ $$$${nos}\:{of}\:{sauare}\:{of}\:{side}\:\mathrm{2}{a}\rightarrow\mathrm{49} \\ $$$${nos}\:{of}\:{square}\:{of}\:{side}\:\mathrm{3}{a}\rightarrow\mathrm{36} \\ $$$${nos}\:{of}\:{square}\:{of}\:{side}\:\mathrm{4}{a}\rightarrow\mathrm{25} \\ $$$${nos}\:{of}\:{square}\:{of}\:{side}\:\mathrm{5}{a}\rightarrow\mathrm{16} \\ $$$${nos}\:{of}\:{swuare}\:{of}\:{sidd}\:\mathrm{6}{a}\rightarrow\mathrm{9} \\ $$$${nos}\:{of}\:{square}\:{of}\:{side}\:\mathrm{7}{a}\rightarrow\mathrm{4} \\ $$$${nos}\:{of}\:{square}\:{of}\:{side}\:\mathrm{8}{a}\rightarrow\mathrm{1} \\ $$

Commented by malwaan last updated on 09/Sep/18

thanks

$$\mathrm{thanks} \\ $$

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