Identify the Predecessor of 6900 in Sequence Exploration

Q: What's the difference between predecessor and successor?

A predecessor is the number that comes before (subtract 1), while a successor is the number that comes after (add 1). Think: predecessor = previous, successor = subsequent!

Q: Why do we subtract 1 to find the predecessor?

Numbers in sequence are consecutive, meaning they differ by exactly 1. Since 6900 comes after our mystery number, we go back one step by subtracting 1.

Q: Does this work for any number?

Yes! This rule works for all whole numbers. The predecessor of 100 is 99, the predecessor of 1001 is 1000, and so on.

Q: What if the problem says 'the number before me is...'?

Then you're looking for the successor instead! If the number before you is 6899, then you are $ 6899 + 1 = 6900 $.

Q: How can I remember which operation to use?

Memory trick: 'After' and 'Add' both start with 'A', while 'Before' and 'Back' both start with 'B' (go backwards by subtracting).

Number Sequences with Predecessor Finding

The number after me is 6900. What number am I?

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Step-by-step written solution

Follow each step carefully to understand the complete solution

Understand the problem

The number after me is 6900. What number am I?

Step-by-step solution

To solve this problem, we'll follow these steps:

Identify the number given as the "next" one, which is 6900.
Use the concept of consecutive numbers to find the predecessor of 6900.

Now, let's work through the solution:
The problem states that the number after the unknown number is 6900. This means we are looking to find the number just before 6900, which is its predecessor.
To find the predecessor, subtract 1 from 6900:

$6900 - 1 = 6899$

Therefore, the solution to the problem is $6899$ .

Final Answer

$6899$

Key Points to Remember

Essential concepts to master this topic

Rule: The predecessor of any number is that number minus 1
Technique: For 6900 predecessor, calculate $6900 - 1 = 6899$
Check: Verify that 6899 + 1 = 6900 to confirm correct predecessor ✓

Common Mistakes

Avoid these frequent errors

Adding 1 instead of subtracting 1
Don't add 1 to find the predecessor = 6900 + 1 = 6901 which is the successor! This gives the number that comes after, not before. Always subtract 1 to find the number that comes immediately before.

Practice Quiz

Test your knowledge with interactive questions

Select the predecessor of the number 2100:

FAQ

Everything you need to know about this question

What's the difference between predecessor and successor?

A predecessor is the number that comes before (subtract 1), while a successor is the number that comes after (add 1). Think: predecessor = previous, successor = subsequent!

Why do we subtract 1 to find the predecessor?

Numbers in sequence are consecutive, meaning they differ by exactly 1. Since 6900 comes after our mystery number, we go back one step by subtracting 1.

Does this work for any number?

Yes! This rule works for all whole numbers. The predecessor of 100 is 99, the predecessor of 1001 is 1000, and so on.

What if the problem says 'the number before me is...'?

Then you're looking for the successor instead! If the number before you is 6899, then you are $6899 + 1 = 6900$ .

How can I remember which operation to use?

Memory trick: 'After' and 'Add' both start with 'A', while 'Before' and 'Back' both start with 'B' (go backwards by subtracting).

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