Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Count the number of balls in picture below:

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

what's the probability of getting a king or a queen from a pack of 52 cards?

What demands an answer, but asks no questions

500 women soldiers are arranged in an array of ten rows and fifty columns in accordance with their respective heights. Now, the tallest woman from each row is asked to move out in the front. From them, the shortest one is labelled as Alpha. They are then asked to resume their original position.

Now, the shortest woman in each column is asked to come out in front. The tallest among them is labelled as Beta.

Can you find out if Alpha will be taller or Beta?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?