MediumMath and Logic
9 marbles, one is heavier. Min weighings on a balance to find it?
Riddle
9 marbles, one is heavier. Min weighings on a balance to find it?
Choose an answer
A.One weighing
B.Three weighings
C.Nine weighings
D.Two weighings
Hint: It's a 2-word phrase with 12 letters, starting with "T".
Answer
Two weighings
Why this is the answer
Divide marbles into three groups of three. Weigh two groups. If they balance, the heavy marble is in the third group. Then repeat with the remaining three.
This riddle is filed under Math Riddles and rated Medium.