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Balls with weighing scales maths game Question:  You are given a set of weighing scales and 9 identical-looking balls. However, one of the balls is slightly heavier or lighter than the others, but you don’t know whether it’s heavier or lighter. Using the scales only twice, how can you identify the odd ball and determine whether it’s heavier or lighter than the others? Answere: 1. Divide the 9 balls into 3 groups of 3 balls each. 2. Weigh two of the groups against each other: • If the scales balance, the odd ball is in the third group. • If one side is heavier, the odd ball is in that group. 3. Take the group containing the odd ball and divide it into 3 individual balls for the second weighing. 4. Weigh two of these individual balls against each other: • If the scales balance, the odd ball is the one not on the scales, and you know its weight compared to the others. • If one side is heavier, that individual ball is the odd one, and you c...

 Boat puzzle Question:   You have a fox, a chicken, and a sack of grain. You need to cross a river, but your boat can only carry you and one other item at a time. If you leave the fox alone with the chicken, the fox will eat the chicken. Likewise, if you leave the chicken alone with the grain, the chicken will eat the grain. How can you transport all three items across the river without any of them being eaten? Answer:

The Mysterious Doorway questions  : You find yourself standing in front of three identical doors. Each door has a guard standing beside it. These guards are known to always tell the truth or always lie, but you don't know which one is which.