2015-II-08
Ans: D
Since the graph opens upwards, then $a>0$.
… Read Since the graph opens upwards, then $a>0$.
Note th
HKDSE-MATH - 2015 - Paper 2 -
2015-II-09
Ans: B
Let $\$x$ be the price of the souvenir. Then the new pri
… Read Let $\$x$ be the price of the souvenir. Then the new pri
2015-II-10
Ans: D
The required amount
… Read The required amount
$\begin{array}{cl}
= & 50\
2015-II-11
Ans: C
$\begin{array}{ccccccccccc}
a & : &
… Read $\begin{array}{ccccccccccc}
a & : &
2015-II-12
Ans: D
Let $z = kx^3y^2$, where $k$ is a non-zero constant. Su
… Read Let $z = kx^3y^2$, where $k$ is a non-zero constant. Su
2015-II-13
Ans: B
Note that $T(1)=5$ and $T(n+1) = T(n) + 4$ for any posit
… Read Note that $T(1)=5$ and $T(n+1) = T(n) + 4$ for any posit
2015-II-14
Ans: C
Note that the greatest possible weight of the bag of wh
… Read Note that the greatest possible weight of the bag of wh
2015-II-15
Ans: C
By applying the Pythagorus Theorem to $\Delta CDN$, w
… Read By applying the Pythagorus Theorem to $\Delta CDN$, w
2015-II-16
Ans: B
… Read Let $x\text{ cm}$ be the radius of the upper base of the
2015-II-17
Ans: D
Note that $ABCD$ is a parallelogram, then $AD//BC$. H
… Read Note that $ABCD$ is a parallelogram, then $AD//BC$. H
2015-II-18
Ans: A
Consider $\Delta ABC$, we have
… Read Consider $\Delta ABC$, we have
$\begin{array}{rcl}
2015-II-19
Ans: C
$\begin{array}{cl}
& \dfrac{\cos 180^\circ}
… Read $\begin{array}{cl}
& \dfrac{\cos 180^\circ}
2015-II-20
Ans: C
… Read Join $AC$.
$\begin{array}{ll}
BC = CD & \text{(
2015-II-21
Ans: B
… Read Since $AC$ and $BD$ are diameters of the circle, then t
2015-II-22
Ans: A
I is true. Let $n$ be the number of sides of the regular p
… Read I is true. Let $n$ be the number of sides of the regular p
2015-II-23
Ans: C
… Read Let $A’$ be the image. Then the rectangular coo
2015-II-24
Ans: A
Note that there are two fixed points $A$ and $B$, and th
… Read Note that there are two fixed points $A$ and $B$, and th
2015-II-25
Ans: B
I is true. Since $L_1$ is on the left of the $y$-axis, th
… Read I is true. Since $L_1$ is on the left of the $y$-axis, th
2015-II-26
Ans: C
The radius of $C$
… Read The radius of $C$
$\begin{array}{cl}
= & 0-(-4)
2015-II-27
Ans: A
Note that the sample space is as follow:
… Read Note that the sample space is as follow:
$\begin{arra