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Find the Next Letter and Number Pair in a Sequence

In this worksheet, students will solve sequences involving combined letter and number pairs with more complex steps, involving addition and subtraction, and forward and reverse motion. It will develop students’ problem solving and sequencing skills.

'Find the Next Letter and Number Pair in a Sequence' worksheet

Key stage:  KS 2

Curriculum topic:  Verbal Reasoning

Curriculum subtopic:  Letter Connections

Difficulty level:  

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Worksheet Overview

QUESTION 1 of 10

Hi there code detective, the puzzles are coming in thick and fast!  Are you ready to try something new? These sequences involve both letters and numbers!

The letters and numbers are joined together in a special order.

 

Here is the alphabet for you to use as a reference:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

 

Look at the following letter and number pair sequence:

C6 is to D8 as E10 is to ______?

 

First, we need to work out how the first letter becomes the second letter.

The letters are moving one place to the right in the alphabet.

Now we need to work out how the first number becomes the second number. This happens by adding two each time.

So we need to add one letter to E and two numbers to 10 to get F12.

 

So the answer is:

C6 is to D8 as E10 is to F12.


Let’s try another:

G7 is to K9 as S12 is to ______?

 

First, we need to work out how the first letter becomes the second letter.

The letters are moving four places to the right in the alphabet.

Now we need to work out how the first number becomes the second number. This is adding two each time.

So we need to add four letters to S and two numbers to 12 to get W14.

 

So the answer is:

G7 is to K9 as S12 is to W14.

 

In this activity, you will need to be sequence superstar to complete the number and letter pairs.

 

Pssstt!! Here’s a handy hint to help you reach superstar status:

Remember to use the alphabet line to help you work out the code.

 

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

C60 is to I56 as Y44 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

L87 is to S82 as G71 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

Z76 is to D85 as Q48 is to ______ ?

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

R76 is to B69 as C94 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
 

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

G75 is to O85 as R64 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
 

 

 

Here are two groups of numbers. Each group follows the same special sequence, but with different numbers. 

 

H99 is to K89  as Z76 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

Z93 is to I100 as I84 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

L88 is to V79 as Y45 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

 

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

W90 is to F100 as Y89 is to ______ ?

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

Y100 is to I91 as J88 is to ______ ?

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
 
  • Question 1

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

C60 is to I56 as Y44 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
CORRECT ANSWER
E40
EDDIE SAYS
Hi there, detective! There are two sequences here. The letter sequence follows the alphabet forwards six jumps. The second sequence is take away four.
Top tip: Check if the number gets smaller or bigger to work out whether it is an addition or subtraction number sequence.
  • Question 2

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

L87 is to S82 as G71 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
CORRECT ANSWER
N66
EDDIE SAYS
Check using the alphabet line. The letter sequence is to make seven jumps forwards in the alphabet. The number sequence is to subtract five. Fantastic!
  • Question 3

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

Z76 is to D85 as Q48 is to ______ ?

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
CORRECT ANSWER
U57
EDDIE SAYS
Did you work this one out? The letter sequence here is to take four jumps forwards in the alphabet. The number sequence is to add nine.
  • Question 4

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

R76 is to B69 as C94 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
 
CORRECT ANSWER
M87
EDDIE SAYS
Did you find the missing letter and number? The letter sequence is to make ten jumps forwards in the alphabet. The number sequence is to take away seven.
  • Question 5

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

G75 is to O85 as R64 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
 

 

 

CORRECT ANSWER
Z74
EDDIE SAYS
The letter sequence is to make eight jumps forwards in the alphabet. The number sequence is to add ten.
Wow, you're already halfway through this activity, sequence spotter!
  • Question 6

Here are two groups of numbers. Each group follows the same special sequence, but with different numbers. 

 

H99 is to K89  as Z76 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
CORRECT ANSWER
C66
EDDIE SAYS
Super sequencing skills! The letter sequence is to make three jumps forwards in the alphabet. The number sequence is to take away ten.
  • Question 7

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

Z93 is to I100 as I84 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
CORRECT ANSWER
R91
EDDIE SAYS
You're doing great, detective! The letter sequence is to make nine jumps forwards in the alphabet. The number sequence is to add seven.
  • Question 8

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

L88 is to V79 as Y45 is to ______ ?

 

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

 

CORRECT ANSWER
I36
EDDIE SAYS
How is the sequence spotting going?
The letter sequence here is to make ten jumps forwards in the alphabet. The number sequence is to subtract nine. Cool!
  • Question 9

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

W90 is to F100 as Y89 is to ______ ?

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
CORRECT ANSWER
H99
EDDIE SAYS
The letter sequence is to make nine jumps forwards in the alphabet. The number sequence is to add ten. I hope you're having lots of fun!
  • Question 10

Here are two groups of letter and number sequences. Each group follows the same special sequence, but with different letters and numbers. 

 

Y100 is to I91 as J88 is to ______ ?

 

You may use the alphabet chart below to help you.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
 
CORRECT ANSWER
T79
EDDIE SAYS
The letter sequence is to make ten jumps forwards in the alphabet. The number sequence is to take away nine.
Thanks for finding all the missing letters and numbers, you've been super helpful!
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