One third of number a and one half of number B. number a must be less than number B, right

Not necessarily. It's all zero or negative. It's all counter examples

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1. The number a is one-half, one-third more than the number B. what is the sum of the two numbers
2. a. B is two continuous natural numbers greater than 0, and their greatest common factor is______ The least common multiple is______ A.1 B．a C．b D．ab．
3. Two two bit natural numbers, their greatest common divisor is 8, and their least common multiple is 96. The sum of these two natural numbers is______ ．
4. There are two natural numbers with two digits. Their greatest common divisor is 6 and their least common multiple is 90. What is the sum of these two numbers What I want is the method. I want to say the method. Why do you do this? I know the answer is 48. But why do you use 6 times 3 times 5? What I'm looking for is the way to do this kind of problem. Why should I divide it into 2x3
5. If the difference between two natural numbers is 5 and the difference between their least common multiple and greatest common divisor is 203, what is the sum of the two numbers? By the way, is there any relationship between the least common multiple and the greatest common divisor?
6. Two two digit natural numbers, the greatest common divisor is 8, and the least common multiple is 96. What is the number?
7. a. B is a natural number, a + B = 12, then the least common multiple of a and B is (), and the greatest common divisor of a and B is ()
8. Three natural numbers, their least common multiple is 24, the greatest common factor is 3, the sum of these three natural numbers is the largest______ ．
9. Three natural numbers, their least common multiple is 24, the greatest common factor is 3, the sum of these three natural numbers is the largest______ ．
10. It is known that the greatest common divisor of two natural numbers is 4 and the least common multiple is 120 Thank you. I want the process. Please explain why
11. The number of a 13 is equal to the number of B______ As the unit "1,"______ ×13=______ ．
12. Three times the number a is one half of the number B, the number a is () times the number B is () times the number a
13. A is half of B. how much is B
14. There is a TV set, a refrigerator, an electric fan and two identical lamps in the home. Their working current is 150 respectively. There is a TV set and an ice cream in the home There is a TV set, a refrigerator, an electric fan and two identical lights in the home. Their working currents are 150 mA, 1.5 A, 300 Ma and 100 Ma respectively. If the current on the trunk road is not allowed to exceed 2.8 A, how many of the same lights can Nanwu use in this trunk road?
15. There are five lights in a classmate's home, and the current of each lamp is 150mA. There are also TV sets, refrigerators, fans and washing machines, which work at the same time They are 300mA, 1.5mA, 200mA and 1a. If the current in the trunk road is not allowed to exceed 3a, can these electrical appliances be used at the same time? Why? emergency
16. A classmate's home is equipped with a TV, a washing machine and two lights. The normal working current is 200mA, 1a, 300mA and 25mA respectively. If the current in the circuit is not allowed to exceed 3a, how many lights can he install at most?
17. Xiaoming's family has a TV, a washing machine and two lights. It is known that the current passing through them is 200mA, 1a, 300mA and 250mA respectively. If the circuit current of Xiaoming's family is not more than 3a, can these appliances be used at the same time?
18. Xiaohong's home has a TV, a washing machine, two identical lamps and a refrigerator. They are connected in parallel. The working current is 250mA, 1.5A, 100mA and 320mA respectively. If the current in the trunk road is not allowed to exceed 3a, can these electrical appliances be used at the same time? Why?
19. All the promotion appliances in a shopping mall are sold at 95% of the original price. The guy bought a TV set with 2470 yuan. How much is the original price of the TV set?
20. In an electrical appliance store, there is a promotion activity on the 11th National Day. The original price of a color TV is 2988 yuan, but now the price has been reduced by 288 yuan. How much of the original price is the current price