Name a key which is hardest to turn.

Can you spot the hidden girl in the picture below?

I look at you, you look at me I raise my right, you raise your left. What am I?

Two men are in a desert. They both have packs on. One of the guys is dead. The guy alive has his pack open, and the guy who is dead has his pack closed. What is in the pack?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

How many times can you subtract the number two from the number fifty?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?