In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Name a key which is hardest to turn.

No matter how little or how much you use me, you change me every month. What am I?

Find the number of squares in the below picture

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

What does the rebus below mean?

TEN BADTION

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?