Quantitative Aptitude - Arithmetic Ability Questions

The first and last terms of an arithmetic progression are 25 and ­52. What is the sum of the series if it has 12 terms?

If 5x - 4 ≤ 2 - x and 4x + 5 > 2x - 5, then x can take which of the following values?

If x = 4aba+b, then what is the value of x+2ax-2a+x+2bx-2b ?

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

What is the value of 1.23+0.83+0.73-2.0161.351.22+0.82+0.72-0.96-0.84-0.56 =

Which of the following quadratic equations has real roots?

What is the altitude of an equilateral triangle whose side is 12 cm?

B is thrice as efficient as A and C is 0.75 times as efficient as A. What is the ratio of number of days taken by A, B and C when they work individually?