Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Ten coins have been arranged as you can see in the given picture. In this arrangement, a triangle is formed pointing upwards. You have to invert the position of the triangle and make it point downwards while changing the position of 3 coins only. Can you do it?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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

Who has married many women but was never married?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Identify the hidden meaning behind this picture?

Assume the given figure to be a delicious doughnut. Yes, now you can concentrate more on the puzzle. So you have this delicious doughnut in your refrigerator when your friends come knocking at the door. There are eight of them. Now you have to make three cuts in this doughnut so that each one of you nine people can enjoy a piece of it. Neither you nor your friends would mind the size of their piece as long as they are getting it. How will you do it?