 - Cover
|
| 4-01 |
 |
|
If
SQ (2, 1) =41;
SQ (4, 3) = 169;
SQ (1, 5) = 125;
SQ (7, 8) = 4964;
Then
SQ (9, 2) = ?
SQ (3, 8) = ?
SQ (5, 0) = ?
SQ (8, 7) = ?
|
| 4-02 |
|
|
 In each line draw the next figure.
|
| 4-03 |
|
|
 What numbers should be put in place of the question marks?
|
| 4-04 |
|
* |
 a)Any number given below corresponds to each segment. What numbers should be put in place of the question marks?
b) Any letter given below corresponds to each figure. What letters should be put in place of the question mark?
|
| 4-05 |
|
|
 Take away from this figure:
1) 8 matches so as to leave 2 squares. This problem has 2 solutions. Find them;
2) 4 matches so as to leave 4 squares;
3) 4 matches so as to leave 5 squares;
4) 4 matches so as to leave 5 equal squares.
|
| 4-06 |
|
|
 Humorous problem. Put 2 matches in such a way so as to make the cow look in the opposite direction
|
| 4-07 |
|
|
 Take away two matches to make the equality correct:
|
| 4-08 |
|
|
 Add 2 matches to make the equality correct.
|
| 4-09 |
|
* |
 Do you know that a shark has several rows of teeth?
Once a shark got a toothache. It went to a famous dentist. As the shark could count only up to 10, it explained the problem in this way: the aching tooth is in the front upper row on the left. If we count from the centre, then it is the eighth tooth, and if we count from the left towards the centre, then it is the fourth tooth. How many teeth are there in the Shark’s front upper row?
|
| 4-10 |
|
|
It had been raining for 4 days in the forest, where Winnie the Pooh lives. Water poured on the floor in Winnie the Pooh’s house. The little bear decided to save most valuable item – his pots with honey. He put them on the branch of a high oak and sat down nearby. Winnie the Pooh spent the first day in the company of 12 honey pots, the second day – in the company of 10 pots, and the third day – in the company of only 8 pots. On what day will Winnie the Pooh be alone on the branch if his appetite does not change?
|
|
|
