cheat?~!

it is hard to study for board exams! but it is harder to make cheats i am not telling u to heat but this article is just an idea ow much ahead can thinking go! i mean just see

1st trick take an pen with light and a pen with transparent ink! and write all the ans on it but u wont be able to see it! y0u will b able to see all the ans only when u see it with lighted pen!