07 May '05 08:57

I am going to give a list of groups of numbers of the form

X,Y,Z

I'd like to see if anyone can discover the missing number, marked with a question mark (?). If you figure it out, just give the number.

Here it is:

2,3,13

2,5,14

2,3,

8,1,3

1,9,27

1,(undefined),8

X,Y,Z

I'd like to see if anyone can discover the missing number, marked with a question mark (?). If you figure it out, just give the number.

Here it is:

2,3,13

2,5,14

2,3,

**?**8,1,3

1,9,27

1,(undefined),8