Page 20 - Math Genius C3

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\ 01-Oct-2025 Bharat Arora Proof-10 Reader’s Sign _______________________ Date __________

When we arrange the numbers in decreasing order, that is, from the greatest to the
smallest, it is called descending order.

So, the descending order of the numbers is: 6543 > 5023 > 2937 > 1359.

Example: The depth of the Atlantic Ocean is 3646 m; the Pacific Ocean is 4280 m;

the Arctic Ocean is 1204 m and the Indian Ocean is 3741 m. Arrange these depths in
descending order.

Solution: Looking at the thousands place digits, 3, 4, 1 and 3; we find that 4 > 3 = 3 > 1.
This means that 4280 is the greatest and 1204 is the smallest. Now, comparing
the hundreds digits of the other two numbers, 3741 and 3646, we find 7 > 6.

So, 3741 > 3646. Th H t O

Thus, the depths of the oceans in descending 3 6 4 6

order are: 4 2 8 0 Greatest number
1 2 0 4 Smallest number
4280 m > 3741 m > 3646 m > 1204 m 3 7 4 1

Knowledge Desk

Most of the Earth's surface is covered by water. The five oceans are the Atlantic, Cross-Curricular Learning
Pacific, Arctic, Indian and Antarctic Oceans.

Practice time 1C

1. Compare the numbers by filling in the blanks with >, < or =.

(a) 524 ____ 2193 (b) 7329 ____ 3279 (c) 8028 ____ 8208

(d) 2613 ____ 2631 (e) 9162 ____ 9126 (f) 9325 ____ 9325

2. In each set of numbers, encircle the smallest number and underline the greatest
number.

(a) 5219 7346 2513 3745 (b) 7116 3745 2015 3200

(c) 8346 7327 8611 5039 (d) 5001 5010 5100 5101
3. Arrange the following numbers in ascending order.

(a) 5846 5346 5446 5146 (b) 8725 9814 8275 857
(c) 9037 9073 9307 9703 (d) 2679 267 9672 967

4. Arrange the following numbers in descending order.

(a) 6738 6378 6873 6387 (b) 3506 7093 239 8132

(c) 1023 3458 1320 3548 (d) 6895 6985 6589 6598

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