Do i have a gift? Needz to know!?

my dad and friends tell me that i have a gift....im really smart i mean not a strieght a's smart... I mean ive been offered to skip a grade even to grades..i dont want to..i can do 12 work...i help my sister with her homework. I can do 22356x65348 in 6 seconds.... And is it bad when im writing #s they move. Idk if i have a gift by i can solve a rubics cube in 3 mins and the new rubics cubes..help plz ive been like this since i was little