Revision

Question 1

What is the principal amount?

Answer 1

The amount of money borrowed or invested.

Question 2

What is the interest amount?

Answer 2

The extra amount of money one has to pay over time.

Question 3

When should you bring all numbers to “1”? During HCF or LCM or Prime Factorization?

Answer 3

LCM & Prime Factorization

Question 4

Give two examples of perfect squares & perfect cubes.

Answer 4

4 & 9.

8 & 27.

Question 5

What is the difference between the product of the prime factors and index notation?

Answer 5

Index Notation = Number will contain the power.

Product of Prime Factors = Number will not contain prime factors.

Question 6

What letter is used for Number Sequences?

Answer 6

n

Question 7

Where is the point of origin on a graph?

Answer 7

The “0” point.

Question 8

When plotting a dot diagram where do we start from?

Answer 8

The 2nd Bottom line.

Question 9

In statistics, what does frequency mean?

Answer 9

The number of times x is mentioned.

Question 10

How to find the median in an even set of numbers?

Answer 10

1. Add 1 to the entire frequency of the numbers.
2. Divide the frequency by 2 and use both numbers, below and above it.
3. Identify their value and find their average.
4. The average is the median!

Question 11

How would one represent “proportion”?

Answer 11

∝

Question 12

What should be on the left side of the equation when doing proportion?

Answer 12

It is the cause.

Question 13

What is commission?

Answer 13

Fee paid to the agent.

Question 14

What is the formula for simple interest?

Answer 14

I = (PRT/ 100)

Question 15

What is the formula for Compound Interest?

Answer 15

A= P([1 + i/100] to the power of n)

Question 16

What should you do to find fractional ratios?

Answer 16

Divide the first one by the second.

Question 17

To convert km/h into m/s, what should one do?

Answer 17

First, MULTIPLY DISTANCE BY 1000m

then DIVIDE IT BY 3600s.

Question 18

Expand (a + b)(x + y).

Answer 18

ax + ay + bx + by

Question 19

Expand (a + b)*

Answer 19

a* + 2(a)(b) + b*

Question 20

Expand (a - b)*

Answer 20

a* - 2(a)(b) + b*

Question 21

Expand (a + b)( a - b).

Answer 21

a* - b*

Question 22

Expand (a + b)( a + b).

Answer 22

a* + b*

Question 23

Give an alternative for ((1/a)square)

Answer 23

1/a square

Question 24

Factorize 3b(p + q) + 8(p + q).

Answer 24

(p + q)(3b + 8).

HCF = (p + q)

Question 25

Factorize (x* - 25).

Answer 25

(x + 5)(x - 5)

NOT ALL TERMS HAVE NUMBERS.

Question 26

Factorize (4y* - 144).

Answer 26

4(y + 6)(y - 6)