Q391. Find the roots of x^2 - 12x + 27 = 0.
- 9 and 3
- -9 and -3
- 9 and 4
- 10 and 3
Show answer and explanation
Correct answer: A. 9 and 3
The equation factors as (x-9)(x-3) = 0.
Mathematics and quantitative reasoning questions appear in many job and entry tests. Practice arithmetic, algebra, percentages, ratios, averages, profit and loss, and geometry. Attempt timed MCQ tests to improve both your speed and accuracy.
Correct answer: A. 9 and 3
The equation factors as (x-9)(x-3) = 0.
Correct answer: C. 1813
37 x 49 = 1813.
Correct answer: B. 40%
Profit = 80; Profit% = (80/200) x 100 = 40%.
Correct answer: A. 2464
44 x 56 = 2464.
Correct answer: C. 61
Sum now = 45; after 8 years add 2x8.
Correct answer: A. 4%
(10/250) x 100 = 4%.
Correct answer: B. 57
The series increases by 9; next = 57.
Correct answer: C. 5200
80 x 65 = 5200.
Correct answer: D. 150
TSA = 6 x side^2 = 150.
Correct answer: D. 20%
Profit = 80; Profit% = (80/400) x 100 = 20%.