How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Can you decipher the below rebus?

PBLUESAISNUERSES

Name a key which is hardest to turn.

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

Can you write down eight eights so that they add up to one thousand?

Where do you go to learn how to make ice cream?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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?