What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

How is the moon similar to a dollar?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

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

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Why do you find that most of the buildings are deprived of the 13th floor?

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?