Core Mathematics quick practice

Question 1 of 10

If f(x) = x² − 3x, find f(−2).

Question 2 of 10

An angle is 20° more than its complement. Find the angle.

Question 3 of 10

Write 0.85 as a fraction in its lowest terms.

Question 4 of 10

Three consecutive odd numbers add up to 57. What is the largest of them?

Question 5 of 10

In modulo 5, 7 is equivalent to

Question 6 of 10

For three sets, n(A ∪ B ∪ C) equals

Question 7 of 10

(a) Construct the multiplication table for modulo 5. (b) Use it to find the multiplicative inverse of 3. (c) Solve 3x ≡ 1 (mod 5).

Question 8 of 10

Compound interest is usually more than simple interest for the same P, R and T (T > 1).

Question 9 of 10

Find k if (x − 2) is a factor of x² + kx − 10.

Question 10 of 10

Evaluate 8 + 19 (mod 4).