Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

What does this Rebus Picture means ?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

Buy me, smell me or deliver me, I do not change.

Who am I?