What is in seasons, seconds, centuries and minutes but not in decades, years or days?

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

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Can you identify the Oscar-winning movie from the rebus below?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

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.