Quantitative Aptitude - Arithmetic Ability Questions

The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?

Solve : 8,23,199.98 × 99.92 = ? × 80,000

The distance between two places can be covered in 3.5hrs at a speed of 62 kmph. If the speed is increased by 8 kmph, how much time would be saved?

If x - 1/x = 1 then what is the value of 1x1x-1-1x+1+1x2+1-1x2-1?

If x + √5 = 5 + √y, and x, y are positive integers, then the value of x+yx + y

If (4x -­ 5) = (3x ­- 1), then the numerical value of (x + 4)2

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

The average (arithmetic mean) amount of savings of ten students is Rs. 600. Three of the students have no savings at all and each of the others have at least Rs. 250 including Nihar, who has exactly Rs. 1300. The largest amount, in Rs., that any one student could have is