Basic Arithmetic Mcqs for the Prepration of FPSC Tests, PSC Tests, NTS Test. Important Arithmetic Aptitude Mcqs questions. Important Arithmetic Aptitude Mcqs questions. average, percentage, Ratio, etc. some of the most important sub categories are: Average, Percentage, Problem on Ages, Time and Distance, HCF and LCM, Logarithms, Discount, Interest, Ratio & Proportion, Decimal Fraction and other.