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

What occurs twice in a week, once in a year but never in a day?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

Move three sticks of the spiral below to form a square.

I have branches, but no fruit, trunk or leaves. What am I?

Rebus Puzzle Definition: A rebus is an illusion device that uses pictures to represent words or parts of words.
What does This Rebus Puzzle Identify?

If 21x = 79x, what is the value of x?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

Name a key which is hardest to turn.

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?