Quantitative Aptitude - Arithmetic Ability Questions

The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85. The average marks of the remaining students is

The sum of the ages of father and son at present is 33. Two years ago the product of their ages was 28. What is the age of the father and the son?

The ratio of present ages of P and Q is 5 : 8. Three years later their ages will be in ratio 8 : 11. What is the present age (in years) of Q?

Find the number that is as much greater than 49 as is less than 95.

The average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. The correct average of the observations is

If x = 1 – y and x2 = 2 – y2, then what is the value of xy?

The value of 2 Tan53°Cot37°-Cot80°Tan10° ?