Jammu and Kashmir Board Solutions for Chapter: Knowing Our Number, Exercise 1: Try These

Make the greatest and the smallest four-digit numbers by using any one digit twice: $3, 8, 7$.

Make the greatest and the smallest four-digit numbers by using any one digit twice: $9, 0, 5$.

Make the greatest and the smallest four-digit numbers by using any one digit twice: $0, 4, 9$.

Make the greatest and the smallest four-digit numbers by using any one digit twice: $8, 5, 1$.

Make the greatest and the smallest $4$-digit numbers using any four different digits with digit $4$ is always at tens place.

Greatest   

Smallest

For example, digit $7$ is always at ones place,

Greatest

Smallest

Make the greatest and the smallest $4$-digit numbers using any four different digits with digit $9$ is always at hundreds place.

Greatest   

Smallest

For example, digit $7$ is always at one's place,

Greatest

Smallest

Make the greatest and the smallest $4$-digit numbers using any four different digits with digit $1$ is always at thousands place.

Greatest   

Smallest

For example, digit $7$ is always at ones place,

Greatest

Smallest

Take two digits, say $2$ and $3$. From them make four-digit numbers, using both the digits equal number of times. Which is the greatest number? Which is the smallest number? How many different numbers can you make in all?