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Total questions: 15
Worksheet time: 28mins
Which of the following is not an arithmetic sequence?
1/2, 1, 3/2, 2
11, 14, 17, 20
2, 4, 8, 16
5, 2, -1, -4
Identify the common difference of the sequence below:
-2.3, -1.1, 0.1, 1.3,...
-1.2
1.3
1.2
-1.3
Write the explicit formula for the sequence shown below.
1, 6, 11, 16
an=1+5(n-1)
an=1−5(n-1)
an=5−(n-1)
an=5+(n-1)
Find the 8th term of a geometric sequence for which a1=2 and r = 7?
823,543
11,529,602
1,647,086
5,764,801
Hint: Find the common difference to help you figure out the rule.
11, 15, 19, 23, ___, _?_
Given the sequence 2, 8, 14, 20, 26, ... What is the common difference?
2
4
6
8
Firewood is stacked in a pile. The bottom row has 20 logs and the top row has 14 logs. Each row has one more log than the row above it.
How many logs are in the pile?
4
5
6
7
If three arithmetic means are inserted between 11 and 39, find the second arithmetic mean.
18
25
32
46
If three geometric means are inserted between 1 and 256, find the third geometric mean.
64
32
16
4
Which term of the arithmetic sequence 4, 1, -2, -5 , . . . is -29 ?
9th term
10 term
11th term
12th term
Find the eighth term of a geometric sequence where the third term is 27 and the common ratio is 3.
2187
6561
19,683
59, 049
Find the common difference in the arithmetic sequence 3,
3,413, 27, 415, ...41
43
25
4
