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

Think Tank Critical Thinking
Write T for true and F for false in the boxes.
1. The greatest 2-digit number is the predecessor of the smallest 3-digit number.
2. The smallest 2-digit number is the successor of the greatest 1-digit number.
3. The smallest 4-digit number is the successor of the smallest 3-digit number.
4. The greatest 3-digit number is the predecessor of the greatest 4-digit number.

eVeN aND oDD Numbers

even Numbers

All numbers that can be made into pairs are called even numbers.
Here are 6 oranges kept in pairs.

So, 6 is an even number.

All numbers that have 2, 4, 6, 8, and 0 in the ones place are even numbers.

For example: 52, 124, 520, 3008, etc.
odd Numbers

Numbers that cannot be made into pairs are called odd numbers.
Here are 7 oranges; of them 6 are kept in pairs and 1 orange is left unpaired. It means 7

cannot be made into pairs.
So, 7 is an odd number.

All numbers that have 1, 3, 5, 7, and 9 in the ones

place are odd numbers. Think Tank Critical Thinking
Is your class roll number
For example: 29, 343, 695, 71, etc. even or odd?

Practice time 1e

1. Complete the following table.

Predecessor Number Successor

(a) 5672

(b) 8791

(c) 998

(d) 4041

(e) 4989

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