Can you identify the hidden rebus in the image below?

What does this simple rebus mean?

How many times can you subtract the number 5 from 25?

What does this mean?

CCCCCCC

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

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

What has many keys but can’t open a single lock?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?