k is a positive integer. An odd number is formed when 5 is subtracted from twice of kk.

  1. (a)

    Write down an expression for the odd number in terms of kk.

    Answer ...

  2. (b)

    The sum between the odd number and the next consecutive odd number is greater than 16.

    Form an inequality in terms of kk and solve it to find the smallest possible value of the larger odd number.

    Answer ...

Work through it with AI →

It won't just hand you the answer — it asks where you're stuck.How the checker works

Worked solution

12(a)

1. Translate the phrase into an expression in terms of $k$.

Twice of kk is 2k2k.

Subtracting 5 from this gives

2k−52k - 5.

Answer

2k−52k - 5

12(b)

1. Express the next consecutive odd number and form the inequality.

From part (a), the odd number is 2k−52k-5.

The next consecutive odd number is
(2k−5)+2=2k−3.(2k-5)+2=2k-3.

Their sum is greater than 1616, so
(2k−5)+(2k−3)>16.(2k-5)+(2k-3)>16.

2. Solve the linear inequality for $k$.

(2k−5)+(2k−3)>16(2k-5)+(2k-3)>16
4k−8>164k-8>16
4k>244k>24
k>6k>6

3. Use the positive integer condition to find the smallest possible larger odd number.

Since kk is a positive integer and k>6k>6, the smallest possible value is
k=7.k=7.

The larger odd number is
2k−3=2(7)−3=11.2k-3=2(7)-3=11.

Answer

Smallest possible value of the larger odd number is 1313.

AI analysis — may contain mistakes.

Worked this one out on paper? Snap your steps and Gigle's AI math checker will circle the step where it went wrong.

More questions on this topic

  1. 1Mrs Ang runs a small tuition centre for secondary school students. The tables provide information on the cost of running…
  2. 2张老板经营两种茶叶:第一种为“采花芽尖”,卖出aa千克总售价为bb元;第二种茶叶为“云顶雾绿”,比第一种茶叶多卖cc千克时,总售价比第一种多cc元。请你帮张老板计算一下,哪一种茶叶单价稍贵些? ((其中b>a)b>a)…
  3. 3一艘轮船在静水中的速度为aa千米//小时,水流的速度为1010千米//小时,轮船顺水航行33小时的航程与逆水航行22小时的航程相差 ___ 千米((用含aa的式子表示).).
  4. 4Adam has some 50-cent and 20-cent coins in his wallet. Given that he has a total of 73 coins adding up to a value of $2…
  5. 5家电下乡是我国应对当前国际金融危机,惠农强农,带动工业生产,促进消费,拉动内需的一项重要举措.国家规定,农民购买家电下乡产品将得到销售价格13%的补贴资金.今年5月1日,甲商场向农民销售某种家电下乡手机20部.已知从甲商场售出的这20部手机…