The total number of years in a century is the same as the number of marbles Gideon has. If he gives 3/4 of the marbles to his sister and multiples the number of remaining marbles by 2, he gets his age five years from now. How old is Gideon now? Give me reasons, before answering the question
A century has 100 years, and if Gideon has as many marbles as the number of years in a century, he has 100 marbles. If he gives 3 / 4 of the marbles to his sister, he gives out 3 / 4 * 100 = 75 marbles. Gideon's total number of marbles remaining after giving 3 / 4 of the marbles to his sister is 100 - 75 = 25. When he multiplies the number of remaining marbles by 2, he gets his age five years from now, meaning he will be 25 * 2 = 50 years old five years from now. Currently, Gideon is 50 - 5 = 45 years old. So the final answer is 45.