It depends on the situation.
Sometimes we have an equation like:
X - 14 = 7, in which we can solve for the letter (in this case, X, which equals 21).
Sometimes they are intended to be variables:
Y = X3-17X + 4, where the letters may be many numbers, but are restricted when other variables are known.
Other times, letters refer to specific constants:
e = approximately 2.718281828.
pi = approximately 3.141592654.
i = sqrt(-1) and is imaginary.
In chemical symbols, superscripts following the letters tell us the number of charges on an ion.
I don't know if it's the only number but the number 4 has four letters in it's name.
4. (67 letters divided by 16 words = 4.4667 letters per word.)
One, two, three, four...doesn't take long to get to it...
there are 33 letters in the cambodian alphabet
In chemical symbols, superscripts following the letters tell us the number of charges on an ion.
Answer You should be able to tell by what they say in the letters. The fact that they are writing you letters says they like you.
By posting the serial number with all letters and numbers before during or after the serial number included.
MISTAKEN is the answer for this puzzle: * letters 1234 are MIST (climate condition) * letters 678 are KEN (a name) * letters 478 are TEN (a number) * letters 1457 are MTAE (can be rearranged to spell MATE, a challenge in chess games.)
Browning now offers history letters. If you call them they will tell you.
the Vin number is located in the lower left corner of the front windshield. it a small strip with numbers and letters on it.
The only number that matches the number of letters it has. Four letters for the number 4.
It's the serial number. If you stated the actual numbers we could tell you when it was made. Letters denote the model and some times the top number represents the year. It all depends on which numbers and letters specifically. auto5man
You didn't tell us the letters.
the registration number is located on the driver's side dash , under the window. the numbers and letters tell you what make and model ,paint color and other useful information.
The number that follows the letters "LIST" on the airhorn of the carb is like the part number. Do a search with it on the net and you should get something straight away.
How about 'four' = 4 letters