Quiz about Form 2 Review Term 1

Question 1

The number 0.000 000 002 1 written in standard form is:

Accepted Answer

$$2.1 imes\ 10^{-9}$$

Answer

$$0.21 imes\ 10^8$$

Answer

$$2.1 imes\ 10^9$$

Answer

$$21 imes\ 10^{-8}$$

Question 2

12 300 000 000 000 000

Accepted Answer

$$1.23 imes\ 10^{16}$$

Answer

$$1.23 imes\ 10^{-16}$$

Answer

$$12.3 imes\ 10^{15}$$

Answer

$$123 imes\ 10^{14}$$

Question 3

Solve the following equation: $$6x-15=2x+1$$

Accepted Answer

$$x=4$$

Answer

$$x=-2$$

Answer

$$x=2$$

Answer

$$x=-4$$

Question 4

Solve the following equation: $$2\left(x-3\right)=4\left(x+3\right)-2$$

Accepted Answer

$$x=-8$$

Answer

$$x=-1$$

Answer

$$x=-5$$

Answer

$$x=-9$$

Question 5

When the number 235 is converted to binary, the answer is:

Accepted Answer

11 101 011

Answer

11 101 110

Answer

10 100 111

Answer

11 101 111

Question 6

$$423_5$$ converted to denary is:

Accepted Answer

113

Answer

33

Answer

110

Answer

423

Question 7

What is the value of: $$7002_8+2773_8$$ in base 8?

Accepted Answer

11 775

Answer

5 117

Answer

26 777

Answer

9 775

Question 8

The value of $$245_8-156_8$$ in base 8 is:

Accepted Answer

67

Answer

79

Answer

55

Answer

89

Question 9

Simplify the following: $$\frac{\ x^3 imes\ \left(2x ight)^5}{\left(2x ight)^4\div\ x^2}$$

Accepted Answer

$$2x^6$$

Answer

$$2x^2$$

Answer

$$x^6$$

Answer

$$\left(2x\right)^6$$

Question 10

Select which of the following is true:

Accepted Answer

$$b^m imes\ b^n=b^{m+n}$$

Answer

$$b^0=0$$

Answer

$$b^n\div\ b^m=b^{m-n}$$

Answer

$$b^m imes\ b^n=b^{n-m}$$

Question 11

How many significant figures are in the number 1.570?

Accepted Answer

4

Answer

3

Answer

2

Answer

1

Question 12

The number 12.789 rounded to 4 significant figures is:

Accepted Answer

12.80

Answer

12.8

Answer

12.79

Answer

12.78

Question 13

A survey was conducted on a class of 40 students. There are 25 students who play Tennis and 20 who play Basketball. If 3 students do not play any sports, how many students play both Tennis and Basketball?

Accepted Answer

8

Answer

42

Answer

45

Answer

5

Question 14

Given two sets X and Y, which of the following notation represents the members in ONLY the set X?

Accepted Answer

$$X\cap\ Y^c$$

Answer

$$X^c\cap\ Y$$

Answer

$$X\cup\ Y$$

Answer

$$X$$

Question 15

The shaded region of the Venn diagram can be represented by:

Accepted Answer

$$\left(A\cap\ B\right)^c$$

Answer

$$A^c\cap\ B^c$$

Answer

$$A\cap\ B$$

Answer

$$A\cup\ B$$

Question 16

John bought a bike at $$\frac{4}{5}$$ its original price. He sold the bike for a 20% profit. If he sold the bike for $240, what was the original price?

Accepted Answer

$250

Answer

$240

Answer

$156.80

Answer

$196

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