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Number Sequences 6
11, 22, 33, 44, etc. This number sequence is increasing by 11.

Number Sequences 6

This Math quiz is called 'Number Sequences 6' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is an enjoyable way to learn if you are in the 3rd, 4th or 5th grade - aged 8 to 11.

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A number sequence is a series of numbers written in such a way that each number in the sequence can be got by following a given rule. For example, in the sequence 4, 16, 64, 256, ... each number in the sequence can be got from the previous term by multiplying by 4. In this case, the rule is: multiply by 4. The numbers in a sequence are called 'terms': in 4, 8, 12, 16, ... '4' is the first term and '12' is the third term.

TIP: Knowing your times tables will help you with sequences.

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1.
Find the missing term.
4, 9, 14, X, ...
19
20
18
17
The next term is got from the previous term by adding 5, e.g. 9 + 5 = 14 and so on
2.
Find the missing term.
13, 29, X, 61, ...
35
45
55
33
The next term is got from the previous term by adding 16, e.g. 13 + 16 = 29 and so on
3.
Find the missing term.
5, 25, 125, X, ...
150
425
625
525
The next term is got from the previous term by multiplying by 5, e.g. 25 ¡¿ 5 = 125 and so on
4.
Find the missing term.
-16, -11, -6, -1, X, ...
4
-4
-5
5
The next term is got from the previous term by adding 5, e.g. -11 + 5 = -6 and so on
5.
Find the missing term.
5, -5, -15, X, ...
-25
15
-10
-30
The next term is got from the previous term by subtracting 10, e.g. 5 - 10 = -5 and so on
6.
Find the missing term.
60, 15, 3.75, X, ...
0.625
0.25
0.125
0.9375
The next term is got from the previous term by dividing by 4, e.g. 60 ¡À 4 = 15 and so on. Use your calculator
7.
Find the missing term.
1, 4, 9, 16, X, 36, 49, ...
25
23
24
32
The terms of this sequence are the counting numbers squared: 12 = 1; 22 = 4; 32 = 9; 42 = 16; 52 = 25 and so on
8.
Find the missing term.
11, 22, 33, 44, X, ...
88
77
66
55
The next term is got from the previous term by adding 11, e.g. 22 + 11 = 33 and so on
9.
Find the missing term.
½, ¼, ⅛, X, ...
112
110
116
132
The next term is got from the previous term by multiplying by ¨ö, e.g. ¨ù ¡¿ ¨ö = ¨û and so on
10.
Find the missing term.
64, 16, 4, 1, X, ...
½
¼
¾
The next term is got from the previous term by dividing by 4, e.g. 64 ¡À 4 = 16 and so on. Use your calculator
Author:  Frank Evans

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