Answer:
found at the back of the book.
What five-letter word becomes shorter when you add two letters to it?
I have a bank, but no money. I have a bed but do not sleep.I have a mouth but cannot eat. What am I?
I am a seven letter word. I am very heavy. Take away two letters from me and you will get eight. Take away one letter from me and you will get 80. What word am I?
I have every color but no gold.
No matter how little or how much you use me, you change me every month.