Quantitative Aptitude - Arithmetic Ability Questions

The average of a,b,c is 20 and that of b,c,d is 25; if d=30, then the value of a is

Pranita got 30 marks more in Math than what she got in Science. Her Math marks are 60% of the sum of her Math and Science marks. What are her Science marks?

If Sin x = 4/5, then Cosec x + Cot x =

What is the value of 1+aa1/2+a-1/2-a1/2+a-1/21+a+a-1/2 ?

Three categories of employees get wages in the ratio of 1 : 2 : 3. If they get increments of 5%, 10% and 15% respectively, what will be the new ratio of their wages?

In the given figure, PQR is a triangle and quadrilateral ABCD is inscribed in it. QD = 2 cm, QC = 5 cm, CR = 3 cm, BR = 4 cm, PB = 6 cm, PA = 5 cm and AD = 3 cm. What is the area in sq.cm of the quadrilateral ABCD?

What is the value of 10.2+10.02+10.002+... upto 9 terms

Rehman walks at 8 km/hr and Roma cycles at 13 km/hr towards each other. What was the distance between them when they started if they meet after 36 minutes?