UNIZIK Mathematics 2020/2021 Past Questions

Practice each question, then open it to see the full details.

The mean of 10 positive numbers is 16, When another number is added, the mean becomes 18, Find the number added

A.32
B.28
C.38
D.42

Simplify $$\frac{10507^0 - \frac19}{0.4}$$

A.5/9
B.10506 8⁄9
C.19/9
D.20/9

A bag contains 4 white balls and 6 red balls. Two balls are taken from the bag without replacement. What is the probability that they are both red?

A.2/9
B.1/3
C.2/15
D.1/5

Find n if 34n =10011₂

A.5
B.6
C.7
D.8

The radius of a circle is given as 5cm subject to an error of 0.1cm. What is the percentage error in the area of the circle?

A.1/25
B.1/4
C.4
D.25

What is the value of x satisfying the equation $$\frac{4^{2x}}{4^{3x}} = 2$$

A.-2
B.-1/2
C.1/2
D.2

Solve the equation 3a + 10 = a²

A. a=5 or a=2
B. a=-5 or a=2
C. a=10 or a=0
D. a=5 or a=-2
E. a=-5 or a=-2

Find the median of the numbers 89,141,130, 161, 120,131,131,100,108 and 119:

A.131
B.125
C.123
D.120

Evaluate 3.0 × 10¹ - 2.8 × 10^-1, leaving the answer in standard form

A. 2 × 10^-1
B. 2 × 10²
C. 2.972 × 10¹
D. 2.72 × 10²
E. 2.97 × 10³

Evaluate 1⁄2 + 2⁄4 + 1 3⁄5

A. 15/16
B. 11/16
C. 49⁄50
D. 3 1⁄5
E. 31⁄2