Number Series 4

Study the numbers to work out which comes next!

Number Series 4

Test your multiplication skills in this 11-plus verbal reasoning number series quiz.

You will be offered a sequence of numbers, and you have to find the missing number each time. Some questions will be straightforward, and you will just have to work out the relationship between the first two numbers, then between the second and third and so on. Some will be more difficult, requiring you to add different numbers in the sequence.

Each question has a helpful comment that appears once you've chosen your answer. These comments explain what the sequence is and some comments also have little extras for you to enjoy - so ensure you read them!

An example has been done for you.

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Example: What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.

2 4 6 8 10 (?)

12
11
14
2

The correct answer is 12 because the numbers are going up by 2 each time. 10 + 2 = 12.
  1. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    835, 724, 613, 502, (?)
    The correct answer is 391 because the numbers are going down by 111 each time. 502 - 111 = 391. 111 is a certain kind of number, and shares its name with the words noon, mum and poop. Do you know its name? Read further down to find out
  2. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    490, 369, 248, 127, (?)
    The correct answer is 6 because the numbers are going down by 121 each time. There really is no way around working this one out with a pencil! 127 - 121 = 6
  3. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    81, 9, 72, 8, (?)
    The correct answer is 63 because the numbers are all part of the 9 times tables. 81 divided by 9 = 9, 72 divided by 9 = 8, so we are looking for what divided by 9 = 7? The answer is 63
  4. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    84, 840, 8400, 84000, (?)
    The correct answer is 840000 because the numbers are multiplied by 10 each time. Remember the easy rule for multiplying a number by 10? Just add a nought (0)
  5. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    6, 36, 216, 1296, 7776, (?)
    The correct answer is 46656 because the numbers are multiplied by 6 each time. Did you know that the number six in French is spelt six, while in Russian it is шесть (pronounced shest.) The puzzle in question 1 asked about 111, poop, mum and noon. They are all palindromes. Well done if you got it right!
  6. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    123, 100, 77, 54, (?)
    The correct answer is 31 because the numbers are going down by 23 each time. 23 is a prime number made up from two other prime numbers (2 and 3)
  7. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    32, 44, 56, 68, (?)
    The correct answer is 80 because the numbers are going up by 12 each time. 68 + 12 = 80
  8. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    89, 78, 67, 56, (?)
    The correct answer is 45 because the numbers are going down by 11 each time. 56 - 11 = 45
  9. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    776, 665, 554, 443, (?)
    The correct answer is 332 because the numbers are going down each time by 111 so we are looking for 443 - 111 = 332. You may have figured out that we like the number 111. We have used it a few times in this series of quizzes because it is such an interesting number! A palindrome (reading the same backwards and forwards), it is also a number which can be divided equally by two prime numbers (37 and 3). But we really like the fact that it is sometimes referred to as a 'Nelson'. Admiral Nelson had 'One Eye, One Arm, One Leg!'
  10. What is the next number in the series of numbers below? Replace the question mark with a number and select the correct answer from the four choices available.
    810, 270, 90, 30, (?)
    The correct answer is 10 because the numbers are being divided by 3 each time. So we are looking for 30 divided by 3 = 10. Wow! You have completed the fourth and final Number Series quiz. We hope you enjoyed these (and the little puzzles and facts that were hidden in the answers). Why not look at some of our other Verbal Reasoning quizzes?

Author: Stephen O'Hara

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