CIE Mathematics Paper-1: Specimen Questions 154 - 156 of 175

Question number: 154

Essay Question▾

Describe in Detail

Anita goes to a bank to change $100 into riyals. The bank takes $2.40 and then changes the remaining amount at a rate of $1=3.75 riyals. How much does Anita receive in riyals?

Explanation

Here, Anita goes to a bank to change $100 into riyals.

The bank takes $2.40.

So, now he has $100$2.40=$97.60

Now, $1=3.75 riyals.

$97.60=?riyals

97.60×3.75riyals=366riyals.

Question number: 155

Short Answer Question▾

Write in Short

The line with equation y=2xk passes through the point (4, 0). Find k.

Explanation

Here, equation is y=2xk and point passing through it is (4, 0).

  • So, (x, y) = (4, 0) put it in the equation: y=2xk.

0=2(4)k

k=8

Question number: 156

Short Answer Question▾

Write in Short

Look at the sequence of numbers 4,8,12,16,

(a) Write down the next number in the sequence.

(b) Find the 8th number in the sequence.

(c) Write an expression, in terms of n, for the nth number in the sequence.

Explanation

Here, sequence is 4,8,12,16,

(a) Here, these numbers are even numbers and also this sequence is having the numbers like:

4,6,8,10,12,14,16,18,20,

So, here bold numbers are not in sequence, so after 16 there will be 20.

(b) Here, further sequence is like: 4,8,12,16,20,24,28,32

So, 32 will be the 8th number in the series.

(c) Expression in terms of n of sequence 4,8,12,16,:[4+(n1)×4], where nN .

  • So, first term will get by: 4+(11)×4=4+0=4.
  • Second term will get by: 4+(21)×4=4+4=8.
  • Third term will get by: 4+(31)×4=4+2×4=4+8=12 and so on.
Share