Number
Sequences
These
sequences can be great fun if you treat them as a game.
Here you have to guess the rule using the clues that you have been given.
These
type of questions give you some numbers and you have to find the missing
numbers.
Here
is an easy example
Fill
in the missing numbers and find the rule
2
4
6
_
10
12 14
_
The
answer is easy its 8 and 16, the sequence is growing by two each time. So the
rule is add 2 to the last number to find the next.
Here
we look at the differences between the numbers.
Start at the second number and take away the number before it. Here we
see the difference of 2 between every number.
Many
patterns can be found by finding the difference and this helps us to predict
what will come next
Try
find the difference in the following sequence
| Can you see the pattern? Check your answer | Answer |
You
see the differences here help you to find the underlying pattern.
This
can be great fun because you can make the rules you use to find the next number
in the sequence harder and harder.
Try
these below and see if you can find the solution to these puzzles
| 1. 200 175 150 _
100 _ _
|
Answer
|
| 2.
1
2
4 8
16 _
64 _
|
Answer
|
| 3.
6000
3000
_
750 325
|
Answer
|
| 4.
1
1
2
3
5
_
13 21
|
Answer
|
Well
how did you find these? We will come back to these at a later date. Well
done!
| 200
175 150
125_
100 50
25
|
Return to
questions
|
| Subtract 25 |
| 1
2
4
16 32
64 128
|
Return to
questions
|
| Double the next number. |
| 6000 3000
1500 750 325
|
Return to
questions
|
| Divide by 2 |
| 1 1
2
3
5
8
13 21
|
Finished
|
| Add the last two numbers together to get the next one |