Quantitative Aptitude - Arithmetic Ability Questions

The sum of two fractions is 3/4. One of them is 2/3. What is the other fraction?

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 1:2 and area of ΔABC is 45 sq cm, what is the area (in sq cm) of quadrilateral BDEC?

In a triangle the length of the side opposite the angle which measures 60° is 15 cm, what is the length of the side opposite to the angle which measures 90°? 

In the following question, four number pairs are given. The number on left side of (–) is related to the number of 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 value of |3(1) - 6|?

Find the average of all prime numbers between 20 and 50.

P + Q = 2(P-Q). If Q = 10, what is the value of P?

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