HKDSE-MATH - 2012

2012-I-01

Ans: $\dfrac{n^5}{m^{12}}$
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& \

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2012

2012-I-02

Ans: $a=\dfrac{7b-8}{3}$
$\begin{array}{rcl}
\dfrac{3

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2012

2012-I-03

Ans: (a) $(x-3y)^2$ (b) $(x-3y)(x-3y+7)$

$\begin{array}

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2012

2012-I-04

Ans: (a) $\$576$ (b) Christine

The daily wage of Ada
$\begin

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2012

2012-I-05

Ans: $54$
Let $x$ and $y$ be the number of male guards and fema

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2012

2012-I-06

Ans: (a) $x<\dfrac{24}{5}$ (b) $4$

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\dfrac{4x+6}{7} & &

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2012

2012-I-07

Ans: (a) $a=11.3$, $b=15.3$ (b) Yes

$\begin{array}{rcl}
1

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2012

2012-I-08

Ans: (a) $\Delta AED\sim\Delta BEC$, $AE=6\text{ cm}$ (b)

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2012

2012-I-09

Ans: (a) $11\text{ cm}$ (b) $624\text{ cm}^2$

Consider the

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2012

2012-I-10

Ans: (a) Mean $=18$, median $=16$ (b) (i) $18$ (ii) No

Mean $=

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2012-I-11

Ans: (a) $\$95$ (b) $\$212$

$C=k_1+k_2A$, where $k_1$ and $

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2012-I-12

Ans: (a) $73\ 728\pi\text{ cm}^3$ (b) (i) $144\ 000\pi\tex

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2012

2012-I-13

Ans: (a) $5$ (b) (i) $15m^3-63m^2+72m$ (ii) No

Let $f(x)=kx

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2012

2012-I-14

Ans: (a) (i) Parallel (ii) $x-3y-6=0$ (b) (i) Yes (ii) $1:1$

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2012

2012-I-15

Ans: (a) $12$ (b) No

The new standard deviation
$\begin{arr

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2012

2012-I-16

Ans: (a) $\dfrac{8}{13}$ (b) $\dfrac{5}{13}$

The require

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2012

2012-I-17

Ans: (a) $(x-6)^2+(y-10)^2=10^2$ (b) $\left(\dfrac{k-4

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2012

2012-I-18

Ans: (a) $23.3\text{ cm}$ (b) (i) $58.6^\circ$ (ii) $\alph

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2012

2012-I-19

Ans: (a) (i) $a=210\ 000$, $b=1.1$, $450\ 153.6501\text{ t

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2012

2012-II-01

Ans: C
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& \dfrac{(2x^4)^3}{2x^5

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2012