Practice Pakistan questions with answers and explanations.
Choose an option to check your answer.
Set x - 3 equal to 5 and -5.
The resulting solutions are x = 8 and x = -2.
Choose an option to check your answer.
The weighted total is 1×2 + 2×3 + 3×5 = 23.
There are 10 observations, so the mean is 2.3.
Choose an option to check your answer.
Square the equation: x² + 2 + 1/x² = 25.
Subtracting 2 gives x² + 1/x² = 23.
Choose an option to check your answer.
Pie-chart size is proportional to sector angle.
The largest angle, 108°, represents the largest part.
Choose an option to check your answer.
Use a² + b² = (a + b)² - 2ab.
Thus, 144 - 70 = 74.
Choose an option to check your answer.
The six-month total is 6 × 80 = 480 mm.
The missing month is 480 - 370 = 110 mm.
Choose an option to check your answer.
Add the geometric terms directly.
Their total is 31.
Choose an option to check your answer.
The total is 400 people.
Males represent 240/400 × 100 = 60%.
Choose an option to check your answer.
The first term is 8 and common ratio is 1/2.
The sum is a/(1-r) = 8/(1/2) = 16.
Choose an option to check your answer.
The increase is 25 on a base of 125.
Thus, 25/125 × 100 = 20%.
Choose an option to check your answer.
For ax² + bx + c = 0, the sum of roots is -b/a.
Here, -(-9)/1 = 9.
Choose an option to check your answer.
The two largest shares are 35% and 25%.
Their combined share is 60%.
