A worksheet based on the principles of substitution involving 18 questions in which the student has to figure out all of the answers to be able to reveal the hidden code.
Previous answers are needed for the subsequent questions so care needs to be taken early on!

Questions of the form, a=2
a+ 2=b
a + 3= c
c+1 = d
(Example questions)
Also including multiplication of the form 3a = ?

Answer sheet included