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

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

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?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?