A wholesale merchant came to me one day and posed this problem. Every day in his business he has to weigh amounts from one pound to one hundred and twenty-one pounds, to the nearest pound. To do this, what is the minimum number of weights he needs and how heavy should each weight be?

Riddle Answer# Math Riddles

## 500 Pages Book

A book has 500 pages:

The 1st page says “Exactly 1 page in this book is false.”

The 2nd page says “Exactly 2 pages in this book are false.”

…

The 500th page says “Exactly 500 pages in this book are false.”

Can any of the pages be true?

Riddle Answer## Birth Year

Imagine you were born in an odd-numbered year (like 1995). Will you celebrate your 50th birthday in an odd or an even year?

Riddle Answer## Binoculars and Case Cost $100

When purchased together, a pair of binoculars and the case cost $100. If the binoculars cost $90 more than the case, how much does the case cost?

Riddle Answer## Twelve Balls and a Scale

Twelve balls are identical in all ways except one has a different weight. Three weighings on a balance scale will not only identify the odd ball, but also tell whether it is heavier or lighter. How many balls must be put on each side of the scale in the first weighing, the second weighing, and the third weighing?

Riddle Answer