Five-digit number

Five-digit number What is the five-digit number, no zeroes, in which the second digit is three times the first, the third is one more than the second, the fourth is four times the first, and the last is one-half more than the second? Click here for the solution The...

The peanuts and the monkey

The peanuts and the monkey Five men checked into a hotel with a bag of peanuts and a monkey. They planned on dividing the peanuts evenly the following morning. However, during the night, one of the men got up, divided the peanuts into five equal parts, took his fifth...

Different arrangements

Different arrangements Four people can sit at a table in twenty-four different arrangements. How many arrangements are possible for seating eight people? Click here for the solution 40,320 ways. ShareTweet more riddles The peanuts and the monkey Five men checked into...

What is the engineer’s name?

What is the engineer’s name? Three business men Smith, Robinson, and Jones all live in the Leeds-Sheffield district Three railway men of similar names live in the same district. The business man Robinson and the guard live at Sheffield, the business man Jones...

What’s the number?

What’s the number? It’s not easy having a mathematics professor as a new friend. When she invites you to her house she says, “All the houses on my side of the street are numbered consecutively in even numbers. There are six houses on my side of my...

How many kids?

How many kids? Sometimes it helps to be bigger–especially when you’re only four or five years old. The children were making candy apples for the Halloween party, eating as they worked. The bigger kids managed to gobble up seven apples apiece (and got...