Quantitative Aptitude - Arithmetic Ability Questions

Average age of 5 students of a school is 14 years. The average age of students and their Mathematics and science teachers is 30 years. If the age of science teacher is 6 years more than the age of Mathematics teacher, then what is the age (in years) of Mathematics teacher?

Find the value of p, if 2x -­ 4, 4x + p and 6x -­ 12 are in arithmetic progression.

Product of digits of a 2-digit number is 18. If we add 63 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.

The sum of two fractions is 3/4. One of them is 2/3. What is the other fraction?

The simple interest on a sum of money is 16/25 of the principal. The number of years is equal to the rate of interest per annum. What is the rate (in percentage) of interest per annum?

What is the slope of the line parallel to the line passing through the points (6,­3) and (2,­1)?

A number is greater than 58 times its reciprocal by 3/4. What is the number?

Find the HCF of 48, 92 and 140