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Anonymous users2024-02-07Problem analysis: To make a certain two piles of stones all light, only need to make two of them have the same number of stones, then if we take the least pile of light first, as long as the remaining two piles are even, and then divide them equally. And the numbers in the question are just enough to meet the requirements.
So, it's okay to take all two piles.
For the second question, to take all 3 piles, it is possible that the total number of 3 piles must be a multiple of 3, but the sum is not a multiple of 3, so it is impossible.
Answer: (1) You can take two piles of stones. If you do the following:
Pile 1, Pile 2, Pile 3.
1900 9 0 (Step 1: 3 piles each take 89).
1900 450 450 (second step: the second pile of 900 is an even number, move half of it into the third pile).
1450 0 0 (Step 3: 450 for each pile).
2) You can't take all three piles. Because 1989 + 989 + 89 = 3067, 3067 3 = 1022....1 is not an integer multiple of 3.
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Anonymous users2024-02-06Answer: (1) You can take two piles of stones. If you do the following:
Pile 1, Pile 2, Pile 3.
1900 900 0 (1st step: take 89 each of the 3 piles) 1900 450 450 (2nd step: the second pile 900 is an even number, move half of it into the third pile).
1450 0 0 (Step 3: 450 for each pile) 2) You can't take all three piles. Because 1989 + 989 + 89 = 3067, 3067 3 = 1022....1 is not an integer multiple of 3.
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Anonymous users2024-02-05Solution: As ef ob, then ef=2, of=1, obtained by the Pythagorean theorem, oe= 5 cos aob= of oe= 1 5= 5 5 Solution: Let the mass of pure concentrated sulfuric acid with a solute mass fraction of 98% be x, then:
1000ml×
The solution is: x The volume of concentrated sulfuric acid required is: g cm3.
The people's congress system is China's fundamental political system.
The reason why the people's congress system has become China's fundamental political system is determined by the characteristics of the people's congress system and its status in China's political life: (1) The people's congress system directly reflects the class nature of our country and embodies the status of all classes, strata and nationalities in the life of the country. (2) The people's congress system is a fundamental political system suited to China's national conditions.
It is a creative product of the Chinese people's revolution and a concrete application of the Marxist theory on political system in China. (3) The people's congress system embodies the whole picture of China's political life and is the foundation on which other systems are built. (4) The people's congress system is the organizational form in which the people realize state power.
The people of all nationalities in our country exercise state power through this system, which ensures the efficient operation of the organs of state power, thus embodying the principle that "all power belongs to the people," which is also the fundamental guarantee for safeguarding the interests of the people.
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Anonymous users2024-02-04Set the number in the tens to x
The number a=x 2......... in the single digit1）
The digit on the hundred digit b=4x+1......（2）
This three-digit number is c = 100b + 10x + a = 100 (4x + 1) + 10x + x 2 = x 2 + 410x + 100 ......（3）
Since b is the number in the hundreds, then b is the natural number between 1 and 9.
According to equation (2), x1 = 0, or x2 = 1, or x3 = 2 is substituted into (3), and the three-digit number is 100 or 511 or 924a + (a + d) + (a + 2d) + (a + 3d) +a+99d) ((a) model + (a+99d)) + a+d) + (a+98d)) + a+2d) + (a+97d)) + a+49d) + (a+50d))
a+a+99d）*50=100a+49510d
1) From the problem, it can be seen that the master assembles 3 units every day, does a day and rests for 3 days, that is, 3 units can be configured in 4 days, that is, 3+1=4 (days) The apprentice assembles 1 unit every 3 days, and does three days and rests for 1 day. It is also 4 days to configure three sets 3+1=4 (days) and then use the apprentice's plus the master's 24 divided by (3+3)=4 4 times 4=16 (days). >>>More
If you roam and brush the map, it is recommended to use the Flame Knight suit or the Yan Mang suit, and you can't see any advantage with the revolver in the early stage of roaming, so it is not recommended to use the revolver in the early stage, and the hand crossbow is a good choice. To level 38 or so, the revolver mastery seems to be to level 8, at that time, the attack speed with the revolver was also fast, roaming a single brush is no problem, level 23 single dark hanging corridor, to level 25 and then go to the single periphery, I was on the periphery to 27 directly went to purgatory to rise to level 33 or so and then single second spine, level 35 to go to the ** place, and then you can single brush to level 38 40 or so, 40 single brush spider cave, here you can practice sweeping the floor very well, spiders can be brushed to level 45, in fact, if you are skilled and ** If you can keep up, you can consider brushing the ridge.,After level 46, you'll go to thieves or something.,It's basically like this.,The back is nothing more than a mouse, a headless ruin, a sorrowful roar, a mechanical cow or something.。 >>>More
Let the radius of circle a r, then the radius of circle c is (13 r)......According to the Pythagorean theorem, ac 13, since the two circles are inscribed, the sum of the radii of the two circles is the diagonal length of the rectangle Because b is inside the circle c, the radius of the circle c: 13 r is greater than the length of cd, i.e. 13 r>5 Because d is outside the circle c, the radius of the circle c: 13 r is less than the length of ab, i.e. 13 r<12 in summary1
This answer should be two One is 1 and the other is 5 under the root number and 1 first: the radius is 1 and the chord ab is the root number 2 It can be seen that the angle AOB is 90 degrees, so the angle bao is 45 degrees, so the angle pab is 45 degrees, which exactly constitutes the isosceles right triangle pab, so we can get that pb is 1 >>>More
I don't think it's the right thing to do upstairs, it's supposed to rotate the diagonal at the same angle, turn it to any position, and get the same area of the four polygons. >>>More