Quantitative Aptitude - Arithmetic Ability Questions

The HCF of 20, 28 and 48 is

What is the value of sin (–π/3) + cos(–π/6)?

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:5 and area of ΔADE is 8 sq cm, what is the ratio of area of ΔADE: area of quadrilateral BDEC?

The difference between the ages of two sisters is 4 years when father's age is 54. Father is elder by 2 years to mother . Younger sister's age is half of mother's age. Find the age of elder sister.

How many diagonals are there in octagon?

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

What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?

What is the reflection of the point (-1 , 3) in the line x = -4?