Quantitative Aptitude - Arithmetic Ability Questions

Due to increase of k% in the side, the area of a square increases by 69%. What is the value of k?

The average marks of 40 students in an examination was 25. It was later found that the marks of one student had been wrongly entered as 73 instead of 37. What is the value of correct average?

The sum of ages of 4 children born at intervals of 4 years each is 60. What is the age of the youngest child?

What approximate value should come in place of the question mark (?) in the following equation (Note: You are not expected to calculate the exact value)?(55.01+16.0003)×22.01÷10.998 =?

If 4(4x + 5) > 2x - 1 > 4x - 3, then the value of x is

The value of x for which the expressions 15 ­ 7x and 15x + 7 become equal is _____.

What is the value of (cos45° + 1/3) ?

If a+1b = 1 and b+1c = 1 then c+1a = ?