Quantitative Aptitude - Arithmetic Ability Questions

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

15 years ago, Shyam was twice as old as Prbhat. Five years from now Prabhat's age will be 5/8 of Shyam's age. What is Shyam's current age?

Four numbers A, B, C and D are such that their overall average is 16. The average of A and B is 9.5. The average of C and D is

If the radius of the cylinder is decreased by 20%, then by how much percent the height must be increased, so that the volume of the cylinder remains same?

In a rhombus _____.

Of the 3 numbers whose average is 64, the first number is 1/3 times the sum of other 2. The first number is

In the following question, select the odd letter/letters from the given alternatives.

8 x {5 - (-2) x (-3)} = ?