2= A or B or C
3=D or E or F
4=G or H or I
5=J or K or L
6=M or N or O
7=P or Q or R or S
8=T or U or V
9=W or X or Y or Z
Change the numbers for the letters. 2 can be A, B or C and so on. The number corresponds to the neopets. Find the neopet that is not listed there and do the process backwards to find the number.
Honestly, I find it extremely bizarre that a math teacher will ask a question that tests zero math ability, but requires knowledge of some obscure things called neopets and the lightningbolt it takes to do the correct keypad conversion.
PS : Seeing as how at least one recent thread by you also involved a "neopets" riddle, I suspect this is yet another.
Please don't try to pass of these "neopets" riddles as genuine school math problems. People end up wasting their time on them when they could instead be helping folks with genuine learning hiccups.
If you did get this from your summer camp math teacher, ignore the above bit but be mindful of the forum guidelines. We can't help you unless you show some effort on your own part first.
Can someone help me please? 
My teacher for Math Summer Camp gave me this Problem. She never told us the answer, I would really like to know.