Quantitative Aptitude - Arithmetic Ability Questions

If secA + tanA = x, then the value of x is

If a + b = 3 and ab = -4, then what is the value of a3 + b3?

Profit of Rs 12,400 has to be divided between three partners A, B and C in the ratio 5:7:8. How much does B get (in Rs)?

If 3x + 5y + 7z = 49 and 9x + 8y + 21z = 126, then what is the value of y?

If x, y, z are the three factors of a3 -7a - 6, then value of x+y+z will be

The mean of a distribution is 15 and the standard deviation is 5. What is the value of the coefficient variation?

Find the odd one out.

Select the odd number from the given alternatives.