Tetrabolo have allowed to solve one more geometrical problem which has arisen still to the invention tetrabolo. Whether there are four flat equal figures from which, putting their four various ways, it would be possible to make the figures similar to each of initial, but four times of the big sizes. It is supposed, that no two figures from an initial set coincide under the form (mirror

6. If p — number of soldiers of the various growth built in one rank from which at least with always appear built on growth — or as its increase, or as its decrease, — that number s2 - least of the squares, satisfying to an inequality с2 ^ the item

Multi-coloured cubes Hintona are too difficult, that them it was possible to describe or explain their device here (the system of training of four-dimensional intuition Hinton has in detail stated in the special book which has left in 1910 under the name В«New era of thinkingВ»). However nothing stirs to us, studying the elementary properties of a four-dimensional hypercube to make the first steps to that wonderful ability of vision of four-dimensional figures as which has started to feel in itself Hinton

Fig. 119. Symmetric razbievi a square of an order 13.

5. The stopper will float in the glass centre only in the event that it is filled hardly above edges. The superficial tension of water will give to a free surface of water small camber.

The brought attention to the question at all does not settle all "depths" of a problem. The following step, obviously, should consist in research of square boards of the various sizes. The case of a board 1 X 1 is trivial. It is easy to see, that for full destruction of all squares from a board 2X2 it is necessary to remove three toothpicks, and from a board 3 X HZ — six toothpicks

When I reached from the underground apartment the FLOCK, ' there was a strong downpour. It proceeded and now, when: I was going to leave.

Рї* + 11Рї2 12

To make from geksiamondov rhomboid ZH P it is possible, n (it is a challenge, therefore I give it reshe | nie to readers as exercise raised work nosti. In all known decisions (one of kotory] is resulted in the end of the head) is absent geksiamond В«lv tuchaja the mouseВ». I do not know, whether there is a decision, in ks torom there is no any another geksiamond.

After a year CHamli has decided, that its turn has come to be sick, and, to true customs, has got down to business rather thoroughly. To me have informed, that CHamli suffers from a toothache. I rather was surprised, because at it a dairy teeth was more recently replaced by constants, and it like early to spoil. Nevertheless he sadly squatted in the cage, keeping a hand for a cheek and an ear, and the kind at it was very pitiful

At anthropoids much more developed intelligence, with them is easier, it is possible even to count on any cooperation sometimes. Already in first two years of existence of a zoo at us both chimpanzees, and CHamli and Lu-lu were sick. Each case was in own way interesting.

Basket volley on pieces as if a fruitcake, also fiber has treated, a mongoose, birds. Soft sunflower seeds had by it so to liking, that they overate literally.

— My God! — with feeling he has said. — I thought, it now will break off me on scraps.

Whether the telegramme to take received to a regret mozhemob rubbish semzelenyh balls rozhno to a floor warmed After long efforts and additional expenses it it is possible to decipher so:

Till now the Dahlia left dry water, but next morning it has overdone. To a gate resthauza, panting, the respectable nice lady in weight for two hundred pounds just over has approached vperevalku. It carefully bore a can of peanut oil which expected to sell to our cook Filipu on a head. He has seen it and has jumped out of kitchen to warn, but was too late

— Well?