Quantitative Aptitude - Arithmetic Ability Questions

If a - b = -7 and a2+ b2= 85, then find ab.

In the following question, select the odd letters from the given alternatives.

If 169 is subtracted from the square of a number, then the result obtained is 7056. What is the number?

P and Q can complete a task in 50 and 20 days respectively. In how many days can they complete 70% of the task if they work together?

Mahmood can do a piece of work in 40 hours. If he is joined by Janaki who is 50% more efficient, in what time will they together finish the work?

A batsman in his 12th innings makes a score of 120, and thereby increase his average by 5. The average score after 12th innings is

A shopkeeper by selling 13 Titan watches, earns a profit equal to the selling price of 3 Titan watches. His profit percentage is

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