Quantitative Aptitude - Arithmetic Ability Questions

If x = [1/(√5 + √3)], y = [1/(√7 + √5)] and z = [1/(√7 + √3)], then what is the value of (x + y + z)?

What is the value of √121 + √12321 + √1234321 + √123454321?

One-third of Poojitha's age three years ago plus one-half of her age two years from now is twenty years. How old is she now?

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

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

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

If 2x- 3(4-2x) < 4x - 5 < 4x + 2x/3, then x can take which of the following values?

If [2(4x/5 - 3/4)]/3 - 5/3 = -1/6, then the value of x is?