(a) 什么是基数为 8 的数字 247 转换为十进制？

153
583
167
247

(b) 找出序列模式的第 n 项：4, 7, 10, 13, 16, …, 注意

a) n +3
b) ！ 3
c) 3n +1
d) 3n！ 1
e) 其他选项都不正确

(c) 写出描述 x 值区间的条件：
[2, 8)。

a) 2 <x< 8
b) 2 <x  8
c) 2  x< 8
d) 2  x  8

(d) 梯子靠在垂直的墙上。 如果梯子上升到 4 m

a) 4
b) 5
c) 8
d) 10

PART A

Candidates should answer ALL of Question 1 in Part A

Question 1

(a) What is the number 247 in base 8 converted to decimal?

Choose ONE option. [4]

a) 153
b) 583
c) 167
d) 247

(b) Find the nth term of the sequence pattern: 4, 7, 10, 13, 16, ··· , noting that
the ﬁrst term in the sequence has index n =1.

Choose ONE option. [4]

a) n +3
b) n ! 3
c) 3n +1
d) 3n ! 1
e) none of the other options is correct

(c) Write the condition that describes the interval for values of x:
[2, 8).

Choose ONE option. [4]

a) 2 <x< 8
b) 2 <x  8
c) 2  x< 8
d) 2  x  8

(d) A ladder leans up against a vertical wall. If the ladder reaches 4 m up the
wall and the foot of the ladder from the base of the wall is 3 m , ﬁnd the

Choose ONE option. [4]
a) 4
b) 5
c) 8
d) 10

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