Remember, if you haven't used our clues pages yet, check out the instructions here to learn how they work and how to best utilize them.
Hint 1
The spiral in the background has a specific name.
Hint 2
There are four instances of the Fibonacci sequence on the front of the card as well.
Hint 3
A familiar rotating cipher following a specific pattern.
Solution
Rotating each word, in each line, following the numbers of Fibonnaci sequence (1,1,2,3) will translate this message - "Mathematics is not solely the study of abstract equations moreso it is a lens by which to understand reality itself." -- Amedeo Alessandro
Hint 1
Easy as pi, though something seems amiss.
Hint 2
That's a lot of digits, but are they all correct?
Hint 3
Be careful, sometimes two numbers next to each other were changed.
Hint 4
Now that you know what numbers are off, can you change that into a word?
Solution
Some digits of Pi have been replaced by other numbers! In order, translated alpha-numerically, the substituted numbers spell 'Numerology'.
Hint 1
Simpler than it may seem.
Hint 2
Remember, every line counts!
Hint 3
Seven sketches means seven letters.
Hint 4
"D" seems like a rather square sort of letter.
Solution
The sketched lines and shapes correspond via number of lines to their numeric equivalents in the alphabet. Left to right, they spell 'Baghdad'.
Hint 1
These stamps seem rather square...
Hint 2
They seem to depict some roots as well...
Hint 3
Square... stamps... depict... roots...
Hint 4
Three stamps for three digits
Solution
Each square stamp shows a different kind of root, and a perfect square number. Take the square root of each stamp, and in order from left to right they read '853'.