List of top Quantitative Ability and Data Interpretation Questions on Number Systems asked in CMAT

If abc > 0, such that a,b,c are integers then which of the following must be true?

If the digit in the unit's place of a two-digit number is halved and the digit in ten's place is doubled, the number thus obtained is equal to the number obtained by interchanging the digits. Which of the following is definitely true?

There are 10 stations on a railway line.The number of different journey tickets that are require by the authorities, is