Quantitative Aptitude - Arithmetic Ability Questions

Select the odd letters from the given alternatives.

The 3rd and 9th term of an arithmetic progression are -8 and 10 respectively. What is the 16th term?

If a3+1a3 = 2, then the value of a2+1a?

If [√(a2 + b2 + ab)] + [√(a2 + b2 – ab)] = 1, then what is the value of (1 – a2 )(1 – b2 )?

What is the value of 2 - 2z + z22 + 2z - z2, when z+2z = 2 ?

The average of 10 numbers is X and one of the number is 38. If 38 is replaced with 19, then what will be the new average?

The mean score in a test of the 12 boys in a class was 16 while the overall mean of the 30 students in the class was 18.1. What was the mean score of the girls?

Arjun and Anurag complete a job in 6 days and 7 days respectively. They worked together and earned a total of Rs. 780. Find Arjun's share in this amount in Rs. ?