The smallest $4-$digit number formed by using the digits $5, 0, 3, 1$ and $7$ only once contains:

Purvi forms two distinct $4-$digit numbers using the same set of digits $1, 3, 4$ and another digit, $X$.  In each number, a digit is used only once. She needs to select the least digit for $X$, such that sum of the number she forms is a $5-$digit number.

Which of the following is the digit, $X$?

"Harry Potter and the Sorcerer’s Stone" is the first book of the Harry Potter series written by J.K. Rowling. Roughly $120$ million copies of the book were sold worldwide.

Which of the following numbers is $120$ million?

John is trying to find out the number of millions in the number, $189345678$.

How many millions are there in the number?

Ramesh bought a piece of land for $₹12,17,423$. He bought another piece of land which was $₹2,38,547$less than the price of the land he purchased first.

How much money did he pay altogether for both the lands?