Home Brain Teasers Brain Teaser – February 15 Brain Teasers Brain Teaser – February 15 By Medical News Bulletin - February 15, 2019 A grandfather is 56 years old and his grandson is 14 years old. After how many years will the grandfather be twice as old as his grandson? See the answer Answer: After 28 years. Let X be the number of years we are looking for. Then we have, 56 + X = 2(14 + X). Solving for X, we get X = 28. Facebook Comments RELATED ARTICLESMORE FROM AUTHOR Brain Teaser – February 25 Brain Teaser – February 22 Brain Teaser – February 18 Connect With Us * Indicates Required Your Name Email Address* Be the first to know about the latest medical and health research. Subscribe to our weekly newsletter.