Calculators in xams

Students are allowed to use battery operated portable calculators in all the subjects. The calculators can be of any type with upto 6 functions,12 digits and upto two memories. Scientific calculators are not allowed.

(Attempt to use any other type of calculators not complying with the specifications indicated above or having more features than mentioned above shall tantamount to use of "unfair means")

you can use those calculators which r of 12 digit , having no check button on it...