Question 1

What is the slope of the line y = 3x + 2?

Correct answer: 3

In slope-intercept form y = mx + b, the slope is m, which here is 3.

Question 2

What is the value of the sum 1 + 2 + 3 + ... + 50?

Correct answer: 1275

Using n(n+1)/2 gives 50×51/2 = 1275.

Question 3

What is 2 to the power of 12?

Correct answer: 4096

2¹² equals 4096.

Question 4

In Euclidean geometry, what do the interior angles of a triangle add up to?

Correct answer: 180 degrees

The interior angles of a Euclidean triangle add up to 180 degrees.

Question 5

How many faces does an icosahedron have?

Correct answer: 20

An icosahedron has 20 triangular faces.

Question 6

What is the greatest common divisor of 54 and 24?

Correct answer: 6

Six is the greatest integer that divides both 54 and 24.

Question 7

What is 30% of 90?

Correct answer: 27

Thirty percent of 90 equals 27.

Question 8

What is the square root of 400?

Correct answer: 20

Twenty multiplied by twenty equals 400.

Question 9

Which number is both the sixth triangular number and a hexagonal number?

Correct answer: 21

Twenty-one is triangular and also the fourth hexagonal number.

Question 10

What is 6 factorial?

Correct answer: 720

6! equals 6×5×4×3×2×1 = 720.