The mother monkey picked a basket of peaches. She asked the little monkey to count how many peaches she had picked. The little monkey counted three peaches in three places. Finally, if there was one more, it would count the more peaches One is thrown aside; it counts five and five, and in the end, there is one more, and it throws one more aside; in the end, it counts seven and seven, and there is one more. It counts three times, but it is still unclear how many peaches there are. Children, do you know how many peaches there are at least in this basket? (the process of seeking clarity)

Because seven seven plus one becomes a multiple of five, the end can only be 9 or 4
And because five five places plus one becomes a multiple of three, the end is 6 or 1
7*7=49,49+1=5*10=50 50+1=3*17=51 51+1=52
A: at least 52

The mother monkey picked a basket of peaches. She asked the little monkey to count how many peaches she had picked. The little monkey counted three peaches in three places. At last, if there was one more one, it would get the more peaches
The mother monkey picked a basket of peaches. She asked the little monkey to count how many peaches he had picked. The little monkey counted three, three, and one more, and then he threw the other one aside. It counted five, five, and one more, and then it threw the other one aside. Finally, it counted seven, seven, and one more. After three times, how many peaches did it have, I still don't know. Do you know how many peaches there are in this basket?

At least 3 × 5 × 7 + 1 = 106

An aluminum wire for experiment is 800 meters long and its cross-sectional area is 1.6 square mm

What is the temperature resistivity under incomplete conditions

∫x/(x+2)(x+3)²dx

It's very easy to rationalize the bottom

How to calculate the hourly power consumption of an electrical appliance? For example, how to calculate the hourly power consumption of a heater 2000W and a rice cooker 500W?

1 degree = 1000 W / h. for example, if the heater is 2000W, it is 2 degrees / h, and if the electric cooker is 500W, it is 0.5 degrees / h

If the range of y = log3 (MX ^ 2-mx-1) is all real numbers, then the range of M is? (3 is the base number, MX ^ 2-mx-1 is the true number)

The range of y = log3 (MX ^ 2-mx-1) is all real numbers, that is to say, MX ^ 2-mx-1 should take all positive numbers
MX ^ 2-mx-1 is a quadratic function, M = 0 must not hold, because at this time = - 1
M0, and it must intersect the X axis, that is, MX ^ 2-mx-1 = 0 to less than one root,
m^2+4m>=0
So m > 0

Connect two light bulbs marked with "220 V, 60 W", "220 V, 40 W" into the circuit of 220 v. what is the actual electric power of each light bulb?

In parallel: the power is 60W and 40W respectively
In series:
R1=U^2/P1=220^2/60=806.67
R2=U^2/P2=220^2/40=1210
I=U/(R1+R2)=220/(806.67+1210)=0.109A
P1=I^2*R1=9.6W
P2=I^2*R2=14.4W

9 / 10 of a number is 3 / 4. What is the number? 3 / 4 minus the product of 3 / 4 and 4 / 5, what is the difference divided by 9
If you answer well, you will be awarded 10 yuan. If you answer quickly, you will be awarded 10 yuan more

3/4÷9/10=5/6

In the circuit, the coil resistance of the motor is 1 ohm, and the voltmeter shows 12 V when the motor is working
The indication of ammeter is 2 A, the electromotive force of battery pack is 22 V, the internal resistance is 0.5 ohm, and the electric power consumed on resistance R is 18 W

（1）R=P/I^2=4.5
（2）p=UI=12*2=24A
（3）P=I^2R=4*1=4w
(4) N = {P (2) - P (3)} / P (2) = (24-4) / 24 = 5 / 6, about 83.3%

78 * 25 + 25 * 23-25 calculation

78*25+25*23-25
=78*25+25*23-25*1
=(78+23-1)x25
=100x25
=2500