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 Blank

What is the missing digit in the ones place?

Type a number as your answer.

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! ^.^