What is the answer to this word problem?
Rodney asked janine to name two 3-digit numbers. she said 265 and 801. He immediately replied, "If you add 734 to those two numbers, your sum will be 1800."
a. How did Rodney pick his number?
b. How did he find the sum so quickly?
c. Use Rodney's rule. If a friend gives you the numbers 326 and 432, what number would you give your friend? What sum would you give?