"Our brains require 0.1 calories every minute simply to survive," he said.

"When we do something challenging such as a puzzle or a quiz we burn through 1.5 calories every minute."

The brain is made up of millions of neurons which communicate with other neurons, transmitting messages to the body.

Neurons produce chemicals called neurotransmitters to relay their signals. These neurons extract 75 per cent of the sugar glucose, available calories and 20 per cent of the oxygen from the blood to create these neurotransmitters.

The GIANT 12 surfaces IQ Pentagon! You may never face this complicated one! Your home cannot miss this one. You may not solve it, you can just disassemble it and try it again! This is the most perfect for your Left & Right Brain Training. Let's GRAB and CHALLENGE it!

The Atlantic's Puzzler, which will take its final bow in September, and The New York Sun's crossword are among the most notable recent casualties, in part because of their Ivy League street cred. (Let's face it: the crosswords in TV Guide and People magazine seldom generate heat at Hamptons dinner parties.) But The Washington Post, The New York Times and countless local newspapers have also trimmed their puzzle space for financial reasons.

The human toll? Ruined Sundays, furious e-mail messages from loyal subscribers and fewer reasons for members of the Obama generation to pause an iPod and pick up a pencil. “Crosswords are not going to die, because they are popular in book and magazine form, and they’re very profitable in print,” said Will Shortz, the crossword editor for The New York Times. "But I think crossword and pencil puzzles in general are ideally suited for newspapers because they become a part of your daily routine. You don’t get that in a book."

Dunn Miller, a 64-year-old librarian from Oakland, Calif., who was attending the National Puzzlers League convention in Baltimore last week, spoke of losing The Puzzler in terms usually reserved for the breakup of a favorite band, like the Beatles. "It's like, why are they murdering us?" she asked. "We're losing one of our stars. It's like if some great athlete, Dennis Eckersley, were told by the manager he had to leave early and he couldn't play for anyone else."

There are other cryptic crosswords Ms. Miller can play to fill the void, she said, like the puzzle in Harper's Magazine. But in her opinion, no constructors can match the "brilliance" of Ms. Cox and Mr. Rathvon. "You get the pleasure of solving each clue, so there's that 'aha' moment over and over — it's like having multiple orgasms," she said.

David Hedley Jones, senior vice president of the Rubik brand, said: "It doesn't need batteries and looks as though it should be quite easy. "But it is incredibly complicated. There are some really cunning tricks to it." Hamleys, the London toy store, has already had thousands of inquiries for the 360. It's head of sales Nigel Wheatley said: "It is our biggest item on the web. I expect thousands to be sold in days."

How does it work? Rubik's TouchCube features touch sensor technology on all six sides, a motion-detecting accelerometer, and colored lights in every square. It even mimics the movements of the original 3x3 Cube-swipe a finger across three squares and the lights will follow, "turning" a side of the Cube; make an "L" shape to turn the top face of the Cube a quarter turn. Rubik's TouchCube's motion-detecting accelerometer only recognizes moves made on the top side of the Cube, so that a player's fingers won’t move the lights on other sides when holding it.

Need some help? Solving the frustrations of hundreds of millions of Rubik's Cube players, Rubik's TouchCube also includes a built-in solver, so now anyone can easily learn how to solve the Cube step by step. Ask for a hint or watch Rubik's TouchCube solve itself.

Afraid you'll lose your place? Internal memory allows players to save their current puzzle so they can resume play anytime.

Love that iconic Rubik's Cube sound? Players can choose between modern or classic sound effects at varying volume levels to have a new or nostalgic Rubik’s experience as they swipe.

Still stressed? Rubik's TouchCube stands alone as a great desk accessory-the colors slide and change while it recharges in its display stand.

Now the reclusive Hungarian inventor hopes to recreate the buzz of Rubik's Cube with his new game, featuring six balls trapped within three transparent plastic spheres.

The puzzle, shown to the Sunday Telegraph ahead of its unveiling at a toy industry fair in Germany on February 5, confronts users with the same frustrating challenge – a task that is simple to understand, with only one possible solution, yet extremely difficult to execute.

Players must get the coloured balls from an inner sphere into matching slots on the outer sphere by shaking them through a middle sphere that has only two holes.