Bags of Marbles Puzzle

You have three bags, each containing two marbles. Bag A contains two white marbles, Bag B contains two black marbles, and Bag C contains one white marble and one black marble. You pick a random bag and take out one marble. It is a white marble. What is the probability that the remaining marble from the same bag is also white?   Our Solution: 2/3 (not 1/2) You know that you do not have Bag B (two black marbles) so there are three possibilities You chose Bag A, first white marble. The other marble will be white You chose Bag … Continue reading Bags of Marbles Puzzle

Apples and Friends Puzzle

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple. Now all your friends have one apple each, yet there is an apple remaining in the basket. How?   Our Solution: You give an apple each to your first nine friends, and a basket with an apple to your tenth friend. Each friend has an apple, and one of them has it in a basket. (Alternative answer: one friend already had an apple and put it in the basket.) Continue reading Apples and Friends Puzzle

10 Tips on Preparing Your Child for SATs

Many parents up and down the country are becoming anxious on their child’s SATs exams that are fast approaching. Well, if you as a parent give your child the correct support then they will be able to achieve those levels that they are capable of. Below are a few ideas on how to prepare your child for their SATs.   Timetable: Make a timetable so your child will know what they will be doing, and when they will be doing it. Thereafter, stick to it by arranging other family activities such as shopping around it. Chores: If your child carries out chores around … Continue reading 10 Tips on Preparing Your Child for SATs