### #1 - Maths Logic Riddle

It can be easily calculated that the digits 0 to 9 can be arranged into 3628800 distinct ten digit numbers.

But i also knowns how many of these numbers are prime.

Do you ?

Zero

The sum of numbers from zero to nine is 45 and can be divisible by 3 and 9.

### #2 - Most Famous Maths Puzzle

I can prove why 1 = 2

* Lets say y = x
* Multiply through by x xy = x2
* Subtract y2 from each side xy - y2 = x2 - y2
* Factor each side y(x-y) = (x+y)(x-y)
* Divide both sides by (x-y) y = x+y
* Divide both sides by y y/y = x/y + y/y
* And so... 1 = x/y + 1
* Since x=y, x/y = 1 1 = 1 + 1
* And so... 1 = 2

How is this possible ?

Step 5 is invalid, because we are dividing by (x-y), and since x=y, we are thus dividing by 0. This is an invalid mathematical operation (division by 0), and so by not following basic mathematical rules

### #3 - Fun Math Puzzle

Baseball bat and ball cost \$50. If the bat cost \$49 more than the ball, what is the cost of each

bat \$49.50, ball \$0.50

If
1 = 5 ,
2 = 25 ,
3 = 325 ,
4 = 4325

Then 5 = ?

1

### #5 - Maths Joke Puzzle

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

pi * z * z * a

### #6 - Marbles Puzzle

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box ?

There are 3 marbles (1 blue, 1 green, and 1 red).

### #7 - Funny Answer to This Riddle

Right now Mum is 21 years older then her child In 6 years her child will be 5 times younger than she. Where is daddy?

5*(X+6) = (X+6)+21
4*(X+6) = 21
X+6 = 5.25
X = -0.75

So daddy is at top of mom

### #8 - Tricky Number Equation Riddle

Can you write number 45 using only the number 4 ?

44+44/44

### #9 - Solve The Riddle

A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?

110
73037

### #10 - Easy Math Riddle

When asked how old he was, Mayank replied, 'In 2 years I will be twice as old as I was five years ago.' How old is he ?

12 years