Quantitative Aptitude - Arithmetic Ability Questions

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

For triangle PQR, find equation of altitude PS if co­-ordinates of P, Q and R are (6,2), (0,3) and (­-4,5) respectively?

What is the third proportional to 9 and 15?

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.

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

What is the equation of the line whose y­-intercept is ­3/4 and making an angle of 45° with the positive x-­axis?

What is the reflection of the point (6, -1) in the line y = 2?

Δ DEF is right angled at E. If m∠F = 45°, then what is the value of 2 Sin F x Cot F?