It can be easily calculated that the digits 0 to 9 can be arranged into 3628800 distinct ten-digit numbers.
But I also know 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.
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
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
Already stated 1=5 =>5=1
If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?
pi * z * z * a
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).
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
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
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
