Can you fill in the numbers in the boxes and solve the puzzle?
Math Riddles
Brother’s Age
When I was 4 years old, my brother was half my age. Now, I’m 18. How old is my brother?
Riddle AnswerTwo Mathematicians Puzzle
Two mathematicians, Tom and Smith are walking down the street.
Tom: I know you have three sons. What are their ages?
Smith: The product of their ages is 36.
Tom: I can’t tell their ages from that.
Smith: Well, the sum of their ages is the same as that address across the street.
Tom: I still can’t tell.
Smith: The eldest is visiting his grandfather today.
Tom: Now I know their ages.
Do you know the age of the kids?
Riddle AnswerDelivering Grain on Time
A collective farm was due to deliver its quota of grain to the state authorities. The management of the Kolkhoz decided the trucks should arrive in the city at exactly 11:00 A.M.
If the trucks traveled at 30 miles per hour they would reach the city at ten, an hour early; at 20 miles an hour they would arrive at noon, an hour late.
How far is the Kolkhoz from the city, and how fast should the trucks travel to arrive at 11:00 A.M.?
Riddle AnswerThe Two Trains Puzzle
Two trains start at the same time, one from London to Liverpool, the other from Liverpool to London. If they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?
Riddle Answer