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

Find the missing number in the image below.

The more you take me, the more you leave me behind.
Who Am I?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What is the coolest letter in the alphabet?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

A solo dice game is played. In this game, upon each turn, a normal pair of dice is rolled and the score is calculated not by adding the numbers but multiplying them.

In a particular game, the score for the second roll is five more than what was achieved in the first roll. The score for the third roll is six less than what was completed in the second roll. The score for the fourth roll is eleven more than what was achieved in the third. The score for the fifth roll is eight less than what was completed in the fourth.

Can you calculate the score for each of the five throws?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?