Quantitative Aptitude - Arithmetic Ability Questions

If A = (-14 + 4) and B = 4 - 14, then AB = 

If a+b=5 and a­b=3, then the value of (a2+b2) is

What is the simplified value of sec6 A – tan6 A – 3 sec2 A tan2 A?

The standard deviation of the set {10, 11, 9, 11, 9} is

A milkman buys milk at Rs 25 per litre and adds 1/4 of water to it and sells the mixture at Rs 26 per litre. His gain (in %) is?

30 women do half of the total work in 30 days. How many more women will be required to complete the remaining work in 10 days?

If the product of two numbers is 3026 and their LCM is 89, then their HCF is :

If 3x= 4y= 12, then z is equal to