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a 5 11 17 23 29 35 41 47

b 7 13 19 25 31 37 43 49

c=a+b 12 24 36 48 60 72 84 96

d=c/12 1 2 3 4 5 6 7 8

c=2 modp,c=-2 mod p

d=p=5 d=4 b=25 d=6 35

d=p=7 d=6 b=35 d=8 d=49

by this method you can get all

Most questions on number theory, divisibility, primes, Euclidean algorithm, Fermat`s theorem, Wilson`s theorem, factorisation, euclidean algorithm, diophantine equations, Chinese remainder theorem, group theory, congruences, continued fractions.

Teacher of math for 53 years**Organizations**

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BSc (Hons) Liverpool (Science). BA (Hons) OU (Mathematics)**Awards and Honors**

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I taught John Birt, former Director of the BBC in 1961. His homework book was the most perfect I have ever marked. And also the most neat. I could tell he was destined for great things.
One of my classmates was the poet Roger McGough, and I have a mention in his autobiography.