What is wrong with the following proof?
2=1
a = b
a2 = ab
a2 – b2 = ab – b2
(a+b)(a-b) = b(a-b)
a + b = b
2b = b
2 = 1
Math Riddles
Half as Long until Midnight
If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now?
Riddle AnswerFill Pool with Water
A swimming pool has four taps. The first can fill the entire pool with water in two days, the second in three days, the third in four days, and the last one can fill the pool in 6 hours. How long will it take to fill the pool using all 4 taps together?
Riddle Answer500 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 Answer3 Full Jars
There are three jars full of equal amounts quarters, dimes, and penny’s. Which one has the highest value?
Riddle Answer