Can you place six X (crosses) in below board without making three in a row in any way ?

Can you name an animal whose killing cannot be performed without spilling your own blood?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

What is the next number in this matchsticks series riddle?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Can you guess the name of the month by looking the below rebus ?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?