The answer is 2. I have 2...the 2 I took away!

3 cause no specification is given for the 2

three apples with him,hence ans=3

the 2 that you take away

How many different positive numbers (integers) can you make using each of the digits 1, 2, 3, 4, once only, and a take away sign?

Example 31-24, or 413-2