Mother's Money
Riddle: Willow is a mother of three children-Richard, aged 17, Sasha, aged 15, and Xavier, aged 13. One morning, Willow was about to leave for work when she discovered that her money was stolen. Her husband was away on a business trip, so the thief could only be one of her kids; Willow asked each of them what they had been doing the previous night. Richard said that he was at the club with his friend David. Sasha said that she had a headache, so she took a painkiller and went straight to bed. And Xavier said that he was at his team's baseball practice. Willow immediately knew which child was lying. Who was it?
Answer: Richard is lying. He couldn't be at the club because he's only 17. And before you say, "He could've been at an after-school club", just note that "the club" usually refers to a nightclub; only folks who are 21 or older can get inside. Because Richard is not old enough to get into the club, he couldn't be in there with his friend. Therefore, he must have taken Willow's money.
Source: https://www.riddles.com/index.php/11366
