Mathematics 1A

Question 1

Is -1 a whole number?

Answer 1

No. Whole numbers are POSITIVE numbers

Question 2

What is 0.12345123451234512345….. in fractional form?

Answer 2

Let x=0.12345123451234512345…
100000x=12345.1234512345….
99999x=12345
x=12345/99999=4115/33333

Question 3

How many s.f does 213400 have?

Answer 3

Depends on the question. 0 may not be counted as a significant figure. So 213400 can have 4,5 or 6 s.f.

Question 4

How many s.f does 1.200 have?

Answer 4

4. 0s after the decimal place are counted as s.f

Question 5

Can 400000000 be represented as 40 x 10^7?

Answer 5

No. The number in front has to be less than or equal to 10. So the correct answer is 4.0 x 10^8.

Question 6

What is 1:

1. Mega
2. Giga
3. Tera
4. Micro
5. Nano
6. Pico

Answer 6

1. 10^6
2. 10^9
3. 10^12
4. 10^-6
5. 10^-9
6. 10^-12

Question 7

What is the formula to find the total amount of money after several years(periods) of compounded interest?

Answer 7

P( 1 + R% )^n

n is the number of years or periods.

Question 8

What is the formula to find the total amount of money after several years(periods) of simple interest?

Answer 8

P( 1 + R% x n )

Question 9

What’s the formula to calculating the total interest?

Answer 9

I= PRT/100
P is the principle
R is the rate of interest
T is time

Question 10

What’s Chargeable and Assessable income and Property tax?

Answer 10

Chargeable: Assessable income - Personal relief
Assessable: Annual income - Donation
Property tax: Annual value of property x Tax rate