# Maths

• Oct 5th 2012, 04:29 AM
Spixol123
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?
• Oct 5th 2012, 04:32 AM
Spixol123
Re: Maths
All good peoples i got it!!
• Oct 5th 2012, 04:32 AM
Spixol123
Re: Maths
its 8850.
• Oct 5th 2012, 04:51 AM
emakarov
Re: Maths
Quote:

Originally Posted by Spixol123
its 8850.

I think it's 9876 - 1023 = 8853.
• Oct 5th 2012, 06:01 AM
MatthiasChampagne
Re: Maths
9876-0123= 9753
• Oct 5th 2012, 06:03 AM
emakarov
Re: Maths
Quote:

Originally Posted by Spixol123
Underneath write the smallest possible four-digit number that can be made with what is left.

Quote:

Originally Posted by MatthiasChampagne
9876-0123= 9753

123 is not a four-digit number.
• Oct 5th 2012, 06:35 AM
MatthiasChampagne
Re: Maths
Quote:

Originally Posted by emakarov
123 is not a four-digit number.

In a computer's memory 01 is not the same as 1.
• Oct 5th 2012, 07:29 AM
Krahl
Re: Maths
Quote:

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
• Oct 5th 2012, 07:33 AM
MatthiasChampagne
Re: Maths
Quote:

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

then how about 9876-0.123=9875.877