**Weighing**ProblemThere are 9 similar balls. Eight of them weigh the same and the ninth is a bit heavier.

How would you identify the heavier ball if you could use a two-pan balance scale only twice?

How would you identify the heavier ball if you could use a two-pan balance scale only twice?

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first, weigh 6 balls, 3 on each side. if one tilts down, the heavier ball is with them. take 2 of them and weigh 1 ball each on the balance scales. if in the first weighing, the two 3-ball sets weigh equally, then the heavier ball is on the third 3-ball set. again, weigh 2 balls, 1 on each side of the balance scale.

ReplyDeletefirst weight 4 ball on each side of balance scale, if both r equal then ninth ball is heavier, else took the heavier set of ball and weigh them again, 2 on each side. again the heavier is taken n found out which is heavier...

ReplyDeletefirstly take 6 balls and weigh 3 on each side. if one tilts down, the heavier ball is with them. take 2 of them and weigh 1 ball each on the balance scales. but if in the first weighing, both sets weigh equally, then the heavier ball is on the third 3-ball set. similarly weigh 2 balls, 1 on each side of the balance scale.

ReplyDeletePrimero, ponemos tres en un lado de la balanza y otras tres en el otro lado, si pesan lo mismo, la bola mas pesada estará dentro de las que no se usaron, de forma contraria estará dentro de las que pesen más en la balanza. De cualquier forma, nos quedan 3 bolas y lo que sigue es: ponemos dos bolas, una en cada lado de la balanza y si pesan lo mismo, la más pesada es la que no usamos, pero si algona pesa más que las otra, pues esa es la buena!!!

ReplyDeletedivide balls in 3 group of 3 ball each. compare first two grp, if the pan is balancing the heavy ball is in grp-3. take two balls of 3rd grp and compare, it would give the heavy ball. if at first instance pan show deflection, take heavy grp and take two balls from it and compare it on scale.

ReplyDeletefirstly take 6 balls and weigh 3 on each side. if one tilts down, the heavier ball is with them. take 2 of them and weigh 1 ball each on the balance scales. but if in the first weighing, both sets weigh equally, then the heavier ball is on the third 3-ball set. similarly weigh 2 balls, 1 on each side of the balance scale.

ReplyDelete