Answer:
When is 1500 plus 20 and 1600 minus 40 the same thing?
What starts with a T ends with a T and is full of T?
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
Tickle with your fingers and a song it will sing. Be careful, though, you may break a string. What is it?
What eight letter word has "kst" in middle, in the beginning and at the end?
It is something you will never see again.