In which direction should the missing arrow point?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?