Answer:
How many people are dead in a standard grave yard?
What is often returned, but never borrowed?
I run cold and hot, I look blue but am red. What am I?
I'm a starchy plant tuber that is one of the most important food crops, cooked and eaten fried, such as french fries.
Sitting down you have it, Standing up you don't.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?