Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd word from the given alternatives.

PQRA is a rectangle, AP = 22 cm, PQ = 8 cm. ΔABC is a triangle whose vertices lie on the sides of PQRA such that BQ = 2 cm and QC = 16 cm .Then the length of the line joining the mid points of the sides AB and BC is

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

What is the value of 2 - 2z + z22 + 2z - z2, when z+2z = 2 ?

What is the value of 2sec2A?

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?

One-third of Poojitha's age three years ago plus one-half of her age two years from now is twenty years. How old is she now?

If a - b = 3 and a2+b2=25, then the value of ab is