Quantitative Aptitude - Arithmetic Ability Questions

What is the equation of the line whose y-intercept is -3 and makes an angle of 45° with the positive x-axis?

In a week, how many times are the hands of a clock at right angles with each other?

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

The median of the numbers 14, 12, 12, 16, 13 and 18 is

The mean of the data 1, 2, 10, 18, 3, 17, 19 is

The mode of the data 12, 1, 10, 1, 9, 3, 4, 9, 7, 9 is

The mean of marks secured by 45 students in division A of class X is 69, 65 students of division B is 65 and that of 50 students of division C is 63. Find the mean of marks of the students of three divisions of Class X.

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is