Quantitative Aptitude - Arithmetic Ability Questions

Product of digits of a 2-digit number is 24. If we add 45 to the number, the new number obtained is a number formed by interchange of the digits.What is the original number?

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

If  2x+14x = 1, then the value of  x2+164x2is

If Girish's salary is 4/9 times of Harishankar's and Shirish's salary is 5/6 times of Harishankar's, what is the ratio of Girish's salary to Shirish's.

What are the roots of the quadratic equation: x2 + 3x ­- 154 = 0

If a2+1a2 = 38, then find the value of a-1a?

What is the sum of the first 12 terms of an arithmetic progression if the first term is 3 and last term is 47?

What is the value of cot 11π/6?