Can you find out which number multiplied by itself will give the output as 12345678987654321?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

Can you place six X (crosses) in below board without making three in a row in any way ?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

Decode below three cipher riddles:

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

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?