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AI Tutor - Lucy
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AI Tutor - Lucy
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!
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The next term is got from the previous term by adding 17, e.g. -39 + 17 = -22 and so on
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The next term is got from the previous term by adding 25, e.g. 217 + 25 = 242 and so on
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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
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The next term is got from the previous term by adding 1.2, e.g. 12.3 + 1.2 = 13.5 and so on
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The next term is got from the previous term by subtracting 16, e.g. 303 - 16 = 287 and so on
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The next term is got from the previous term by subtracting 1.5, e.g. 14.3 - 1.5 = 12.8 and so on.
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The next term is got from the previous term by dividing by 5, e.g. 125 ÷ 5 = 25 and so on
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The next term is got from the previous term by dividing by 10, e.g. 200 ÷ 10 = 20 and so on
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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.
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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…
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