If eleven plus two equals one, what is nine plus five equal to?

Answer: Two (Clock)

More Difficult Riddles with answers

More Difficult Riddles

If it is 1,800 kilometers to America, 1,200 kilometers to Japan, 2,400 kilometers to New Zealand, and 1,400 kilometers to Brazil- How far is Morocco?
If Mississippi should lend Missouri her New Jersey, what would Delaware?
If Teresa’s daughter is my daughter’s mother, who am I to Teresa?
If you happen to wear one of these warm garments around, you might get doused in red paint.
If you like pretty gems that sparkle and shine, I invite you to dig in my virtual mine. My first is purple, fit for a king, My second is green where Dorothy did her thing. My third is red, July's birthstone as well, My fourth is seen in strings and is found inside a shell. My fifth is hard, pure Carbon, and expensive to buy, My sixth is Crocidolite, striped like the big cat's eye. Seventh is two words, a man-made fake of April's stone, Eighth is very dark and found at Lightning Ridge alone. Now take from each gem, one letter in its turn, And you will find the stuff for which even the gods yearn. What am I?
If you spot one of these eastern warriors, they're not doing their job right.
If you throw a bottle of wine, a carton of juice and a can of soda at someone’s head, which one will hurt the least?
If you're stealing honey, be prepared to receive vengeance in this form.
In many years, not much has happened. In many minutes, a lot has happened. In one second, everything has happened.
In Paris but not in France, the thinnest of its siblings.
In the evening I'm long, in the morning I'm small; When seen in a ballroom, I'm nothing at all.
In the forest, this blends in just right, but every December it is covered with lights. What is it?