Quantitative Aptitude - Arithmetic Ability Questions

A, B and C can do a job working alone in 12, 16 and 24 days respectively. In how many days they can do the job if they worked together?

The arithmetic mean of the marks scored by students of a class is 58. 20% of them secured a mean score of 60. The mean score of another 30% of the students was 40. The mean score of the remaining students is

Select the odd letters from the given alternatives.

Determine the value of y-1y2 when y4+1y4=34

Which of the following quadratic equations has real roots?

Select the odd word from the given alternatives.

Weight of A and B are in the ratio 11 : 8. A’s weight increases by 40% and the total weight of A and B increases by 30%. What is the percentage increase in the B’s weight?

 In ΔABC measure of angle B is 90 deg. If cotA = 7/24, and AB = 1.4cm, then what is the length (in cm) of side AC?