Quantitative Aptitude - Arithmetic Ability Questions

Solve : x - 3 = 3x + 7

Which of the following statement(s) is/are TRUE?

$$\begin{gathered} I. 12>163>244 \\ II. 253>324>486 \\ III. 94>153>246 \end{gathered}$$

Simplify 5x(x + 2) + 4x

ΔABC is right angled at B. If cotA = 8/15, then what is the value of cosC ?

If 3/5 of x is equal to 4/9 of y, then what is the ratio of x and y?

If 3=1.732, then what is the value of (3 - 103 + 27) ?

Find the value of 76413+ 2713314

In a class, 30% of the students offered English, 20% offered Hindi and 10% offered both. If a student is selected at random, what is the probability that he. has offered English or Hindi ?