Top 5 Hard Math Puzzles

#71 - Tricky Math Problem

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem ?

#72 - Logical Number Series Riddle

Solve this logical number series puzzle by replace question mark with the correct number
9090 = 4
1234 = 0
6055 = 2
9081 = 4
8888 = ?

#73 - Logic Puzzle Riddle

There are two arch enemy Messi and Ronaldo which hate each other to an extreme.
One day two are going together and a Jeanie appeared in from of them them.
Jeanie grant 3 wishes to Ronaldo and one to Messi.

Messi replied smartly 'Give me twice of whatever Ronaldo demands'.

Ronaldo asked his 1st wish 'Give me 10000 billion dollar'. Soon Messi gets 2000 billion dollar.
Ronaldo asked his 2nd wish 'Give me one mansion in every country of the world'. Soon Messi gets two mansion in every country of the world?

Whats should be Ronaldo third wish ?

#74 - Ten Letter Word Popular Riddle

I know a ten letter word in the English language which can be typed using only the top rows of the computer keyboard.

#75 - Hard Measuring Water Riddle

You have two buckets of 11liter and 6liter.
How can you measure exactly 8liter ?

#76 - Frog In The Well Riddle

A frog fell on a bottom of the well.
The well is 30 feet deep.

During day time, the frog jumps 5feet while at night when the frog sleeps he slip back 4feet.

In how many days frog will come out from the well ?

#77 - Trick Teaser Ias Interview Question

A Sweet girl purchased a book from a bookkeeper and give him Rs. 100.
The cost of the book is Rs.30 but the bookkeeper had got no change, so he gets the change from next shop and returns the girl her 70 Rupees.

After some time the next shopkeeper comes with the 100Rs note and told the bookkeeper that the note is fraud, so he takes money back.

How much loss did the bookkeeper face?

#78 - Trivia Question 8549176320

why number 8549176320 is one of a kind ?

#79 - Tricky Probability Interview Puzzle

I have two coins.
* One of the coin is a faulty coin having tail on both side of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blind fold myself and pick a coin and put the coin on table. The face of coin towards the sky is tail.

What is the probability that other side is also tail ?

#80 - Top Short Riddle

There is something which you can be arrested for attempting but not for successfully completing ?