Quantitative Aptitude - Arithmetic Ability Questions

If 3a – (3/a) – 3 = 0, then what is the value of a3 – (1/a3) + 2?

The value of tan 315° cot (­ -405° ) is equal to

The value of (1 - √2) + (√2 - √3) + (√3 - √4) + ..... + (√15 - √16) is

When a discount of Rs. 42 is allowed on the marked price of an article, the new reduced price becomes 86% of the original price. Find the marked price.

Gautam travels 160 kms at 32 kmph and returns at 40 kmph. Then average speed is

Manjeet can do a work in 18 hours. If he is joined by Jaya who is 100% more efficient, in what time will they together finish the work?

The LCM of 56, 84 and 112 is

If a3 + b 3 = 35 and ab = 6, then what is the value of a + b?