Quantitative Aptitude - Arithmetic Ability Questions

The age of Dr. Pandey is four times the age of his son. After 10 years , the age of Dr. Pandey will be twice the age of his son . The present age of Dr. Pandey's son is

Two chords AB and PQ of a circle intersect at D inside a circle. If AD = 4 cm, DB = 6 cm, QD = 3 cm, the length of PQ is equal to

What is the difference of the factors of the expression x2 + (1/x2) – 6?

In a class of 50 students there are 27 girls. The average weight of these girls is 45 kg and average weight of the full class is 49.6 kgs. What is the average weight of the boys of the class?

Two numbers are 35% and 40% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number?

If a-1a=1, then a2 + 1a2 ?

What is the simplest form of (1 + cosA)(cosecA ­ cotA)?

What is the value of tan 300°?