Quantitative Aptitude - Arithmetic Ability Questions

A group of boys has an average weight of 36 kg. One boy weighing 42 kg leaves the group and another boy weighing 30 kg joins the group. If the average now becomes 35.7 kg, then how many boys are there in the group?

Some carpenters promised to do a job in 15 days but 3 of them were absent and remaining did the job in 20 days. What was the original number of carpenters?

By selling a table for Rs. 16,870, a shopkeeper suffers a loss of Rs. 1080. His loss percentage (rounded off to one decimal place) is

In the following question, select the odd word pair from the given alternatives.

Find x, if 5x-6+5x+6 = 6

If a = √2 + 1 and b = √2 - 1, then the value of 1a+1+1b+1 will be

What is the value of [1 – sin (90 – 2A)] / [1 + sin (90 + 2A)]?

If sinA = x, then x is equal to