
Math question!?
Shazwan had 7 gold, which was exactly equal in size and shape. Found that all the gold coins a excepy were equal in weight. It also found that foreign currency was out of a lighter than others. How could see the gold coin Light from the rest with a balance and make only two weighings? Pls help me I'm onli PRI 3 and do not know how to do this. pls tell me in simple words for simple non-simple words I can understrand if complicated
Heavy First: Put three coins on each side of the scale. If the balances, you know that the currency did not scale the light. If there is balance, the currency of the light must be one of the three on the lighter side of the scale. Second weighing: Delete all currencies have all three coins from the lighter side and put one on each side of the scale. This will show if one of the two is lighter than the other. If the balances, then the two currencies have the same weight lighter and currency should be the third.
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