Solve the following 4 problems:

1. Which numbered choice represents the sum of these expressions:          1) 2) 3) 4)         2. Which numbered choice represents the difference:          1) 2) 3) 4)         3. Which numbered choice represents the product:          1) 2) 3) 4)         4. Which numbered choice represents the expansion of:    1) 2) 3) 4)

Read carefully!!
Form a 4-digit number from your answer choices, taken in order from question 1 to question 4. Multiply this number by the square of 10. Place this answer in the address below (following the capital letters "PA"), and type the address into your browser to find the next hidden box.

http://mathbits.com/caching/PA__________.html