# 2014 June(72C) Math Question 1

Choice C

To calculate the mean of n numbers, take the sum of the n numbers and divide it by n. $$\frac{370+310+380+340+310}{5}=342$$

# 2014 June(72C) Math Question 2

Choice H

A discount is a percentage that is subtracted from a number.

For example, a 10% discount of $30 is$3 (10% converted to a decimal is .10 and .10 x 30 is 3).

$12 x 25% =$3

# 2014 June(72C) Math Question 3

Choice A

$$450 = c\cdot 10^3 \\$$ $$\Rightarrow x=0.45$$

# 2014 June(72C) Math Question 4

Choice H

% increase = Increase ÷ Original Number × 100

$12 × 106% =$12.72

# 2014 June(72C) Math Question 5

Choice E

In a Geometric Sequence each term is found by multiplying the previous term by a constant.

The constant for the sequence in question is -3. Therefore the sequence is:

1, -3, 9, -27, 81, -243, 729, ...

# 2014 June(72C) Math Question 6

Choice K

A square root of a number a is a number y such that y^2 = a; in other words, a number y whose square (the result of multiplying the number by itself, or y ⋅ y) is a. $$\sqrt{a} = 36 \\ ⇒a = 36^2 = 1296$$

Choice C

# 2014 June(72C) Math Question 55

Choice E

The square root must be …

# 2014 June(72C) Math Question 56

Choice F

It can be observed that …

# 2014 June(72C) Math Question 57

Choice E

The absolute value of a …

# 2014 June(72C) Math Question 58

Choice J

The smallest angle must be …

# 2014 June(72C) Math Question 59

Choice D

To reduce a fraction to …

# 2014 June(72C) Math Question 60

Choice J

As we can see from …