1. ## Maths

Hi i am doing an aptitude test and the book that im practicing off has a question written exactly like this?

From the digits 0, 1, 2, ..., 9 write the largest possible number using four of them. Underneath write the smallest possible four-digit number that can be made with what is left. (You can only use a digit once.) subtract the second number from the first. Your answer is:............

Im wondering if the ... is suppose to be a number you can pick from your choice?

2. ## Re: Maths

All good peoples i got it!!

its 8850.

4. ## Re: Maths

Originally Posted by Spixol123
its 8850.
I think it's 9876 - 1023 = 8853.

5. ## Re: Maths

9876-0123= 9753

6. ## Re: Maths

Originally Posted by Spixol123
Underneath write the smallest possible four-digit number that can be made with what is left.
Originally Posted by MatthiasChampagne
9876-0123= 9753
123 is not a four-digit number.

7. ## Re: Maths

Originally Posted by emakarov
123 is not a four-digit number.
In a computer's memory 01 is not the same as 1.

8. ## Re: Maths

Originally Posted by MatthiasChampagne
In a computer's memory 01 is not the same as 1.
I doubt they are referring to the binary system

9. ## Re: Maths

Originally Posted by Krahl
I doubt they are referring to the binary system