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The Aurora AX-501 is an ideal introduction to scientific calculators and is suitable for use in late KS2 and KS3. The clear single-line LCD displays 10 digits and there are a total of 131 different functions. Special features include complex number calculations and number base conversions and calculations using binary (base 2), hexadecimal (base 16), octal (base 8), and off-course decimal (base 10). Other features include a single memory, 4 bracket levels, FIX/SCI/NORM, x, %, -, +, =, π, √, M+, %, negative indicator, BackSpace/Delete, degrees, radians, gradian, standard deviation, roots and forces, trigonomics (Sin/Cos/Tan), hyperbolics, degrees/minutes/seconds, logarithms, exponents and reciprocals. s, factors, permutations, combinations, coordinate conversions and random numbers. The AX-501 features a snap-on hard shell for protection, durable and robust plastic keys, a screw-on battery compartment and is an inexpensive scientific calculator approved for use on all UK exams that allow the use of calculators.