Which tank will fill first?

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?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

Can you move 2 matchsticks to form four equal sized squares.

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

How can one talk without saying a single word?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Why is the Hole below a Lock?

What does this rebus mean?

O
N
C
E
TIME

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