Finding the greatest common factor and least common multiple of 84 and 126 by short division

Finding the greatest common factor and least common multiple of 84 and 126 by short division

Maximum common factor: 42
Least common multiple 252
From 1 to 2008, there are () natural numbers which are just multiples of the two numbers in 3, 5 and 7
The multiple of 15 is 133
The multiple of 21 is 95
The multiple of 35 is 57
The multiple of 105 is 14
133+95+57-14*3=243
The sum of the three numbers of a, B and C is 78. A is three times of B, and C is one third of B. what are the three numbers?
There should be formulas. Don't make equations. If it's OK, you'll get more points
B = 78 / (3 + 1 + 1 / 3) = 18
Then a = 3 * 18 = 54
C = 18 / 3 = 6
The answers are as follows:
B is three times as much as C, a is three times as much as B, and a is nine times as much as C
So C = 78 (1 + 3 + 9) = 6
B = 6 × 3 = 18
A = 6 × 9 = 54
A 54 B 18 C 6
3x + X + one third x = 78 A: 3x = 54 B: x = 18 C x = 6
The ratio of the number of people in workshop a and workshop B is 3:2. After 20 people are transferred from workshop a to workshop B, the ratio of the number of people in workshop a and workshop B is 7:8
The problem is how many people are there in each workshop
A is x, B is y
x：y=3：2
【x-20】：【y+20】=7：8
y=60
x=90
The ratio of the number of people in the two workshops is 3:2, and Party A accounts for 3 / 5 of the total
The ratio of the number of people in the two workshops is 7:8
So total = 20 / (3 / 5-7 / 15) = 150
A = 150 * 3 / 5 = 90
B = 150 * 2 / 5 = 60
One hundred and fifty
The sum of the numbers a, B and C is 78. The number a is more than 2 times the number B, and the number B is less than 3 times the number C. 2
Let C be x, then B be 3x-2, so a is 2 (3x-2) + 4. According to the meaning of the question, we can get the following equation: x + 3x-2 + 2 (3x-2) + 4 = 78, & nbsp; & nbsp; & nbsp; & nbsp; X + 3x-2 + 6x-4 + 4 = 78, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp
There are two workshops. The number of people in workshop a is 58 of that in workshop B. after 48 people are transferred from workshop B, the number of people in workshop a is 14 less than that in workshop B. how many people are there in workshop a?
85 − 43 = 415, 48 △ 415 = 180 (people); answer: there are 180 people in workshop a
The sum of the numbers a, B and C is 78. The number a is more than 2 times the number B, and the number B is less than 3 times the number C. 2
Let C be x, then B be 3x-2, so a is 2 (3x-2) + 4. According to the meaning of the question, we can get the following equation: x + 3x-2 + 2 (3x-2) + 4 = 78, & nbsp; & nbsp; & nbsp; & nbsp; X + 3x-2 + 6x-4 + 4 = 78, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp
The number of people in workshop a is two-thirds of that in workshop B. If 8 people are transferred from workshop B to workshop a, the number of people in workshop a is 80% of that in workshop B,
How many people are there in workshop a
80%=4/5
8/[4/（5+4）-2/（3+2）]=180
180*2/（3+2）=72
The sum of the numbers a, B and C is 187. The number B is twice that of the number C, and the number a is four times that of the number B?
Let C be X
2x+8x+x=187
x=17
2x=34
8x=136
Let C be x, then B be 2x and a be 4 * 2x = 8x
X+2X+8X=187
11X=187
X=17
2X=2*17=34
8X=8*17=136
A: number a is 136; number B is 34; number C is 17.
Let B be x, C = x / 2, a = 4x
4x+x+（x/2）=187
（11/2）x=187
x=34
So a = 34 * 4 = 136
B = 34
C = 34 / 2 = 17
Suppose that number C is one, then number B is two, and number a is eight,
If 187 divided by (1 + 2 + 8) equals 17, then 17 is a portion,
So number C is 17, number B is 17 times 2 equals 34, number a is 17 times 8 equals 136
It's solved by sharing.
The ratio of the existing number of people in the two workshops is 5:3. If 12 people are transferred from workshop a to workshop B, the number of people in the two workshops is equal. How many people are there in the two workshops
The difference between the number of people in workshop a and workshop B: 12 × 2 = 24 (people) the difference between the number of people in workshop a and workshop B: 5-3 = 2 each: 24 △ 2 = 12 (people), so 12 × 5 = 60 (people) in workshop a and 13 × 3 = 36 (people) in workshop B