Here's a way to translate it into English:
"What number president was Cory?"
You can also say:
* "Which president number was Cory?"
* "What was Cory's presidential number?"
It's important to note that "Cory" refers to Corazon Aquino, the 11th president of the Philippines. So, the answer to the question is "Cory was the 11th president."