Mathematics MCQs

The extreme value 48 pulls the mean upward.
The median is resistant to the outlier and better represents the center.

Set x - 3 equal to 5 and -5.
The resulting solutions are x = 8 and x = -2.

An identity matrix has 1s on the main diagonal and 0s elsewhere.
It leaves a compatible matrix unchanged under multiplication.

The weighted total is 1×2 + 2×3 + 3×5 = 23.
There are 10 observations, so the mean is 2.3.

Square the equation: x² + 2 + 1/x² = 25.
Subtracting 2 gives x² + 1/x² = 23.

Substitute x = 5 into the function.
Then f(5) = 2(5) + 1 = 11.

An angle subtended by a diameter at the circumference is a right angle.
This result is known as Thales' theorem.

Area is one-half × sum of parallel sides × height.
Thus, 1/2 × 22 × 5 = 55 cm².

A horizontal line has a constant y-coordinate.
Therefore, an equation of the form y = constant is horizontal.

For independent events, multiply their probabilities.
Thus, 1/2 × 1/3 = 1/6.

The three interior angles of every Euclidean triangle sum to 180°.
This is a fundamental angle property.

The diameter is twice the radius.
Thus, 2 × 7 = 14 cm.