Page 18 - ICSE Math 5

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Since 8 > 7 on comparing the two numbers,
80613408
therefore 8,06,13,408 > 7,89,21,036.
78921036
Thus, the ascending order and the descending order of the given numbers are as
follows.

Ascending order: 83,43,999 < 7,89,21,036 < 8,06,13,408 < 13,00,55,444
Descending order: 13,00,55,444 > 8,06,13,408 > 7,89,21,036 > 83,43,999

Formation of Numbers

We know that we can form different numbers by arranging the given digits in different orders and
changing their place values.

• If the digits are arranged in ascending order, we obtain the smallest number.
• If the digits are arranged in descending order, we obtain the largest number.
Example 9: Form the smallest and the largest numbers using the digits 2, 3, 5, 6, 1, 4 and 7.

Solution: The smallest 7-digit number that can be formed using the digits, 2, 3, 5, 6, 1, 4 and
7 is 12,34,567 and the largest 7-digit number that can be formed is 76,54,321.

Exercise 1.3

1. Compare the following pairs of numbers. Put the correct sign <, > or =.

(a) 76,25,434 96,52,434 (b) 1,08,33,409 98,92,489

(c) 13,05,99,318 8,66,92,439 (d) 94,92,085 4,94,93,136

2. In an auto expo, some new cars are showcased. Their prices are mentioned below.

A B C D
` 13,05,382 ` 2,03,45,500 ` 89,32,000 ` 4,45,89,414

(a) Compare the prices of the following cars. Put the correct sing <, > or =.

(i) Car A Car C (ii) Car D Car B

(iii) Car C Car B (iv) Car D Car A

(b) Arrange the prices of the cars in descending order.

(c) Among the given cars, which is the most expensive and which is the least expensive?

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