Quantitative Aptitude - Arithmetic Ability Questions

The line passing through the point (5,a) and point (4,3) is perpendicular to the line x - 6y = 8. What is the value of 'a'?

Which of the following is correct?

Select the odd number from the given alternatives.

Select the odd word/letters/number/number pair from the given alternatives.

If 192 pens cost is Rs.10, how many pens can be bought for Rs.5?

The sum of three numbers is 252. If the first number is thrice the second and third number is two-third of the first, then the second number is

Product of digits of a 2­digit number is 12. If we add 36 to the number, the new number obtained is a number formed by interchange of the digits. What is the number.

Which of the following numbers is a perfect square?