Quantitative Aptitude - Arithmetic Ability Questions

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

The 3rd and 9th term of an arithmetic progression are -8 and 10 respectively. What is the 16th term?

If [√(a2 + b2 + ab)] + [√(a2 + b2 – ab)] = 1, then what is the value of (1 – a2 )(1 – b2 )?

If sinC + sinD =X, then the value of X is?

What is the perimeter of the sector whose central angle is 60° and radius of the circle is 21 cm?

Point P (8 , 5) is the midpoint of segment AB. Co-ordinates of A are (5, y) and B are (x, -3). What is the value of x?

The mean score in a test of the 12 boys in a class was 16 while the overall mean of the 30 students in the class was 18.1. What was the mean score of the girls?

Which of the following numbers is a perfect square?