What Number Am I? (Numbers Up To 10000)

What Number Am I? (Numbers Up To 10000)

Question 1

I am a number with the digits 1, 3, 4 and 5.

I am the greatest number between 3500 and 4500.

What number am I?

What can we do?
We can write the question in another way:

Form the greatest 4-digit number with digits 1, 3, 4 and 5. 
This number must be between 3500 and 4500.

First, draw 4 blanks like this:

_ _ _ _ to fill in the blanks with digits 1, 3, 4 and 5

Next, we have to re-arrange the digits 1, 3, 4 and 5 to meet the 2 conditions:

• Must be between 3500 and 4500

• Must form the greatest number

Let's Think

5 is the greatest digit among 1, 3, 4 and 5.

As the 4-digit number must be between 3500 and 4500, the digit 5 cannot be in the thousands place. 

Multiple Choice

Which is the greatest number among 1, 3, 4 and 5?

• 1

• 3

• 4

• 5

Multiple Select

If the 4-digit number cannot be greater than 4500, can the digit 5 be in the thousands place?

• Yes

• No

Form the greatest 4-digit number with digits 1, 3, 4 and 5. This number must be between 3500 and 4500.

• We now consider digit 1, 3 and 4.

• The greatest digit is 4, followed by 3, then 1.

• Since the 4-digit number must be greater than 3500, the digit in the thousands place is 4.

Multiple Choice

Since the 4-digit number must be greater than 3500, the digit in the thousands place is 4.

• True

• False

Form the greatest 4-digit number with digits 1, 3, 4 and 5. This number must be between 3500 and 4500.

• Now, we are left with the digits 1, 3 and 5. 

• The greatest digit is 5, followed by 3, then 1. 

• Since the 4-digit number cannot be more than 4500, 5 cannot be in the hundreds place.

Multiple Choice

Since the 4-digit number cannot be more than 4500, the digit in the hundreds place should be 3 as 3 is greater than 1.

• I agree

• I disagree

Did you guess correctly?

The digit in the hundreds place is 3 as it is greater than 1. 

We can get a number which is between 3500 and 4500.

Form the greatest 4-digit number with digits 1, 3, 4 and 5.

This number must be between 3500 and 4500.

• There are two digits left, 1 and 5. 

• Since 5 is greater than 1, the digit in the tens place is 5.

Fill in the Blanks

Multiple Choice

The greatest number (between 3500 and 4500) that we can form with 1, 3, 4 and 5 is ____.

• 3541

• 4135

• 4351

• 4531

Question 2

I am a number with the digits 3, 4, 5 and 6.

I am the greatest number between 4500 and 6500.

What number am I?

What can we do?

We can write the question in another way

Form the greatest 4-digit number with digits 3, 4, 5 and 6.

This number must be between 4500 and 6500.

Remember to also draw 4 blanks:

_ _ _ _ to fill in the blanks with digits 3, 4, 5 and 6

Multiple Choice

6 is the greatest digit among 3, 4, 5 and 6.

• True

• False

Was your answer correct?

As the 4-digit number is between 4500 and 6500, the digit 6 is in the thousands place. 

6 _ _ _ _

Multiple Choice

Form the greatest 4-digit number with digits 3, 4, 5 and 6. This number must be between 4500 and 6500.

Which number will you put in the hundreds place now?

• 3

• 4

• 5

Were you correct?

Since the 4-digit number must be smaller than 6500,

5 cannot be in the hundreds place.

Thus, the digit in the hundreds place is 4 as it is greater than 3.

6 4 _ _

Multiple Choice

You are left with the last two digits, 3 and 5.

6 4 _ _

To get the greatest number between 4500 and 6500, choose the best answer below.

• 6435

• 6453

Was your answer correct?

Now, try and do the questions on

Math Page 31 to 32

Try your best! ^.^