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Maths Quiz - Number Sequences 3 (Easy) (Questions)

So, you have made it to the third in our Easy series of Eleven Plus maths quizzes on Number Sequences – well done for making it so far! In this quiz, just like the others, we shall ask you to predict which number comes next. That might seem impossible – no one can predict the future. But once you spot the rule governing the series, the answers become obvious.

It’s all about spotting the pattern. Here’ an example:

2, 6, 18, X, …

Which number comes next? This is where trial and error comes in. The numbers are increasing so we’re either adding or multiplying. 6 is 4 more than 2, but 18 is 12 more than 6, so addition seems unlikely. Okay then, 2 x 3 = 6, and 6 x 3 = 18. We’ve found the rule. So, the next number will be 18 x 3 = 54.

See how simple it is? Now you are ready to take the quiz. Good luck!

1. Find the missing term.
-39, -22, X, 12, …
[ ] -5
[ ] -11
[ ] 5
[ ] 0
2. Find the missing term.
217, 242, X, 292, …
[ ] 268
[ ] 267
[ ] 266
[ ] 265
3. Find the missing term.
3.6, 4.5, X, 6.3, 7.2, …
[ ] 5.6
[ ] 5.5
[ ] 5.4
[ ] 5.3
4. Find the missing term.
12.3, 13.5, X, 15.9, 17.1, …
[ ] 14.5
[ ] 14.8
[ ] 14.6
[ ] 14.7
5. Find the missing term.
303, 287, X, 255, 239, …
[ ] 271
[ ] 270
[ ] 269
[ ] 268
6. Find the missing term.
14.3, 12.8, X, 9.8
[ ] 10.2
[ ] 11.3
[ ] 10.8
[ ] 11.8
7. Find the missing term.
125, 25, X, 1, 0.2, …
[ ] 15
[ ] 10
[ ] 5
[ ] 2
8. Find the missing term.
200, 20, X, 0.2, 0.02, …
[ ] 2.22
[ ] 2.02
[ ] 2.2
[ ] 2
9. Find the missing term.
8, 12, X, 27, 40.5, …
[ ] 16
[ ] 18
[ ] 20
[ ] 22
10. Find the missing term.
32, 80, X, 500, 1,250, …
[ ] 90
[ ] 120
[ ] 200
[ ] 320
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Maths Quiz - Number Sequences 3 (Easy) (Answers)
1. Find the missing term.
-39, -22, X, 12, …
[x] -5
[ ] -11
[ ] 5
[ ] 0
The next term is got from the previous term by adding 17, e.g. -39 + 17 = -22 and so on
2. Find the missing term.
217, 242, X, 292, …
[ ] 268
[x] 267
[ ] 266
[ ] 265
The next term is got from the previous term by adding 25, e.g. 217 + 25 = 242 and so on
3. Find the missing term.
3.6, 4.5, X, 6.3, 7.2, …
[ ] 5.6
[ ] 5.5
[x] 5.4
[ ] 5.3
The next term is got from the previous term by adding 0.9, e.g. 3.6 + 0.9 = 4.5 and so on. If you know your 9 times table you will have spotted this one straight away
4. Find the missing term.
12.3, 13.5, X, 15.9, 17.1, …
[ ] 14.5
[ ] 14.8
[ ] 14.6
[x] 14.7
The next term is got from the previous term by adding 1.2, e.g. 12.3 + 1.2 = 13.5 and so on
5. Find the missing term.
303, 287, X, 255, 239, …
[x] 271
[ ] 270
[ ] 269
[ ] 268
The next term is got from the previous term by subtracting 16, e.g. 303 - 16 = 287 and so on
6. Find the missing term.
14.3, 12.8, X, 9.8
[ ] 10.2
[x] 11.3
[ ] 10.8
[ ] 11.8
The next term is got from the previous term by subtracting 1.5, e.g. 14.3 - 1.5 = 12.8 and so on.
7. Find the missing term.
125, 25, X, 1, 0.2, …
[ ] 15
[ ] 10
[x] 5
[ ] 2
The next term is got from the previous term by dividing by 5, e.g. 125 ÷ 5 = 25 and so on
8. Find the missing term.
200, 20, X, 0.2, 0.02, …
[ ] 2.22
[ ] 2.02
[ ] 2.2
[x] 2
The next term is got from the previous term by dividing by 10, e.g. 200 ÷ 10 = 20 and so on
9. Find the missing term.
8, 12, X, 27, 40.5, …
[ ] 16
[x] 18
[ ] 20
[ ] 22
This one was quite tricky – well done if you spotted that the numbers are being multiplied by 1.5: 8 x 1.5 = 12, 12 x 1.5 = 18, etc.
10. Find the missing term.
32, 80, X, 500, 1,250, …
[ ] 90
[ ] 120
[x] 200
[ ] 320
This one was really tricky – top marks for those of you who realised that the numbers are being multiplied by 2.5: 32 x 2.5 = 80, 80 x 2.5 = 200, etc…