Long DENSA test — only for smart people

Questions:

1. Johnny’s mother had three children.  The first child was named April.  The second child was named May.  What was the third child’s name?

2. There is a clerk at the butcher shop, he is five feet ten inches tall and he wears size 13 sneakers. What does he weigh?

3. Before Mt. Everest was discovered, what was the highest mountain in the world?

4. How much dirt is there in a hole that measures two feet by three feet by four feet?