S1 Algebra overall _1

• 3+ 2(n −1).

• 3− 2(n −1).

• 3− 2n.

• 3+ 2n.

• 9

• 12

• 15

• 18

It is given that the nth term of a sequence is 5n + 6 . What is the difference between the 3rd term and the 5th term of the sequence?

• -10

• 10

• 52

• 651

• 5, 11, 21, 35

• 5, 11, 15, 19

• 2, 8, 18, 32

• 2, 5, 11, 21

• 3

Which of the following is the expression of the square number 64 as the sum of two consecutive triangular numbers?

•  64 =15+ 49

•  64 =19+ 45

• 64 = 26+38 

• 64 = 28+36

How many square numbers are there from 150 to 200?

• 1

• 2

• 3

• 4

• I only

• I and II only

• II and III only

• I, II and III

The first positive term of the sequence −15, −12, −9, −6, ... is the

• 5th term.

• 6th term.

• 7th term.

• 8th term.

Find the next two terms of the sequence 128, −64, 32, −16, ....

• −8, 4

• 8, −4

• −4, 2

• 4, -2