Quantitative Aptitude - Arithmetic Ability Questions

The average age of 36 students in a group is 14 years. When the teacher's age is included in it, the average increases by one. The teacher's age in years is

In a class of 39 students there are 36 girls. The average weight of these girls is 38 Kg and average weight of the full class is 40 kgs. What is the average weight of the boys of the class?

What is the reflection of the point (5 , -1) in the line y = 2?

AB is a chord of the circle and its center is “O”. ON is perpendicular to AB. If the length of AB=20 cm, ON-(2√11) cm, find the radius (in cm) of the circle.

If  a+1/a = 3, then a3+1a3?

The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?

Select the odd letters from the given alternatives.

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