Enigmatic Code

From New Scientist #676, 20th November 1969 [link] I had been saving a roll of black and white check linoleum for something but, taking it down from the cupboard today, I find my wife has been at it.

From New Scientist #3611, 5th September 2026 [link] The goal is to divide the grid into non-overlapping rectangles.

From Sphinx Magazine, December 1933 Reconstruct the extraction of square root: The puzzle is credited to: “M.

From New Scientist #675, 13th November 1969 [link] Dear Headmaster, You ask how my classics class did in exams.

From New Scientist #3610, 29th August 2026 [link] Circle numbers in the grid below to use them, or cross them out to get rid of them.

From New Scientist #674, 6th November 1969 [link] Aunt Agatha has a lovely and unusual necklace made of uniform rings linked to form a continuous chain.

From New Scientist #3609, 22nd August 2026 [link] The goal is to divide the grid into non-overlapping rectangles.

From New Scientist #673, 30th October 1969 [link] Four perfect logicians took three Hearts and five Spades from a pack of cards, shuffled them and dealt themselves two each face down.

From New Scientist #3608, 15th August 2026 [link] Circle numbers in the grid below to use them, or cross them out to get rid of them.

From New Scientist #672, 23rd October 1969 [link] For readers who like to see what they are doing, here for a change is a Tantalizer in undress.

From New Scientist #3607, 8th August 2026 [link] The goal is to divide the grid into non-overlapping rectangles.

From New Scientist #671, 16th October 1969 [link] George, Harris and I spent our holiday in sunny Sindonia this year.

From Sphinx Magazine, December 1933 ABACDEBDECA is a cube.

From New Scientist #3606, 1st August 2026 [link] Circle numbers in the grid below to use them, or cross them out to get rid of them.

From New Scientist #670, 9th October 1969 [link] The rector of Bogside will preach on Brotherly Love at Matins this Sunday in the village of Egdon.

From Sphinx Magazine, November 1933 Reconstruct the multiplication: The puzzle is credited to: “M.

From New Scientist #3605, 25th July 2026 [link] The goal is to divide the grid into non-overlapping rectangles.

From New Scientist #669, 2nd October 1969 [link] My wife’s family want him called Adolphus, Bertrand, Clayforth, Deuteronomy, Engels.

From Sphinx Magazine, November 1933 Reconstruct the extraction of square root: The puzzle is credited to: “M.

From New Scientist #3604, 18th July 2026 [link] Circle numbers in the grid below to use them, or cross them out to get rid of them.

From New Scientist #668, 25th September 1969 [link] Here is a position which I reached last week in a postal game against Professor Ulan Bator of Outer Mongolia.

From Sphinx Magazine, November 1933 Reconstruct the extraction of square root: The puzzle is credited to: “M.

From New Scientist #3603, 11th July 2026 [link] The goal is to divide the grid into non-overlapping rectangles.

From New Scientist #667, 18th September 1969 [link] For her birthday the dwarves made Snow White an umbrella with seven panels.

From Sphinx Magazine, November 1933 Reconstruct the multiplication: The puzzle is credited to: “M.

From New Scientist #3602, 4th July 2026 [link] Circle numbers in the grid below to use them, or cross them out to get rid of them.

From New Scientist #666, 11th September 1969 [link] Perhaps the most improbable chess tournament of all time was played at Munchausen in 1876.

From Sphinx Magazine, October 1933 GALLUS and AMICUS are squares, MAN and LANGE are primes, UME and GEMIS each of them equals three times a prime number.

I found an article on the history of cryptarithms [link] that gives an example that is possibly the earliest published example of the genre (although the term cryptarithm had yet to be coined).

From New Scientist #664, 4th September 1969 [link] Pallas University has no less than five chairs in philosophy.

From Sphinx Magazine, October 1933 Reconstruct the multiplication: The puzzle is credited to: “M.

From “Tantalizers: A Book of Original Logical Puzzles” (1970) The three suspects, quailing before Holmes’ stern gaze, deposed as follows: Tom: Dick did it.

From New Scientist #663, 28th August 1969 [link] You may have seen those neat calendars where the date is given by two cubes laid side by side in a box, so that only the top face of each is visible.

From Sphinx Magazine, October 1933 Reconstruct the multiplication: where: OCTO, CTO, CTOB, TO, TOBR, TOBRE, OBRE, BRE, BR, RE, E are 11 prime numbers.

From “Tantalizers: A Book of Original Logical Puzzles” (1970) The Chippings Post is published at an entirely random time each afternoon, but George Handcuff, the local tycoon, must have his copy within the hour.

From New Scientist #662, 21st August 1969 [link] The vicar of Much Snoring has been trying to recall the epic horseshoe-knotting contest of 1921.

From Sphinx Magazine, October 1933 OCTOBRE is divisible by 3 and by 7.

From “Tantalizers: A Book of Original Logical Puzzles” (1970) Montmorency left as one morning at Iffley Lock and returned three hours later, chased by men waving sticks and frying pans.

From New Scientist #662, 14th August 1969 [link] I take my holidays seriously.

From Sphinx Magazine #166, October 1933 Find the key of this multiplication.

From “Tantalizers: A Book of Original Logical Puzzles” (1970) Envy, Hatred and Malice are the Fellows of St Jude’s who teach Astronomy, Biology and Chemistry.

From New Scientist #661, 7th August 1969 [link] My friend MacAristotle has been studying the community of crofters who inhabit the awful Isle of Oomph.

From Sphinx Magazine #164, October 1933 The prime number AAAB, multiplied by 7, gives the product BEEDC.

From New Scientist #660, 31st July 1969 [link] Barbara Bocardo, the well-known lady logician, has developed a weakness for the occult.

From Sphinx Magazine #163, October 1933 ABCD is divisible by 17.

From New Scientist #659, 24th July 1969 [link] Lateral thinking, which, being interpreted, means thinking about the sides of things, is all the rage at present.

From Sphinx Magazine #162, October 1933 ABCABD = DEB² There is no BrainTwister puzzle published in this week’s issue of New Scientist.

From New Scientist #658, 17th July 1969 [link] Twiddles is a frustrating patience played with coloured cubes.

From Sphinx Magazine, September 1933 [sphinx30]

From New Scientist #3593, 2nd May 2026 [link] [link] There are five ways to write the number 5 as the sum of odd numbers: 1+1+1+1+1 3+1+1 1+3+1 1+1+3 5 (a) How many ways can the number 6 be written as the sum of odd numbers?