What does below chemistry rebus means?

Prove that the below maths equation is true.

8 + 8 = 91

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

My location can be determined by the below rebus.
So where am i ?

What is the difference between a jeweller and a jailer?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?