What does below chemistry rebus means?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Solve the counting riddle by identifying the number of triangles in the given picture.

If Rajina's daughter is my daughter's mom, who am I to Rajina?

What is the largest number you can write with just 3 digits?

One evening there was a murder in the home of a married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

Can you count the number of triangles in the given picture?

Find the smallest sentence with all the English alphabet.

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'