Brainteaser of the day: Find a number less than 100 that is increased by one-fifth of its value when its digits are reversed.
Answer: 45 (1/5 of 45 = 9, 9 + 45 = 54).
Brainteaser of the day: In my hand, I have two coins that are newly minted. Together, they total 30 cents. One isn’t a nickel. What are the coins?
Answer: A quarter and a nickel.
Brainteaser of the day: During which month do people sleep the least?
Answer: February (there are usually fewer nights in February).
Brainteaser of the day: What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?
Answer: 13112221. Each sequence of numbers is a verbal representation of the sequence before it. Thus, starting with 1, the next sequence would be “one one,” or “11.” That sequence is followed by “two one,” or “21,” and so on and so forth.
Brainteaser of the day: Guess the next three letters in the series GTNTL.
Answer: I, T, S. The complete sequence is the first letter of every word in the sentence.