(X+ 18)/3 =(342+ 18)/3 = 120

Divide a number by 3 and add 18 to the result to get132:; If you add this number to 18, the result is divided by 3, and you get (120).

64/2=32,32/2= 16, 16/2=8,8/2=4,4/2=2,2/2= 1,32+ 16+8+4+2+ 1=63

A school held a table tennis competition, and 64 students participated in the singles competition. The competition adopts the single elimination system, that is, two people compete, the loser is eliminated, and there is only one champion. * * * Demand (63 games).

A+B= 176, that is, one of the numbers ends with 0. Then another number ends with 6. The result is 68, which means that the ten digits ending in 0 are 2. So there are ten numbers ending in 6 that are 5. So these two numbers are 56 and 120 respectively.

The sum of two numbers is 176. Xiaohong left out the "0" in the unit when calculating this problem, and the calculated sum is 68, so the smaller of the two numbers is (56).

The coat price is A, the trousers price is B, the total currency price is S, and the rest sets are C.8A = S, A = S/8, 10B = S, B = S/ 10. I have bought a pair of trousers, and spent S/ 10, 9s/65438.

Aunt Wang brought some money to buy clothes. She can buy 8 shirts and 10 pairs of pants. Now that she has bought a pair of trousers, the remaining money can be used to buy (4) sets.

( 1- 1/2)*( 1- 1/3)*( 1- 1/4)*...*( 1- 1/2009)*( 1- 1/20 10)= 1/2* 2/3*3/4*...2008/2009*2009/20 10= 1/20 10

After calculating the value in each bracket, it is found that the denominator of the previous value and the numerator of the latter value are the same, so that the denominator of the previous value and the numerator of the latter value are rounded off, leaving only the numerator of the first value and the denominator of the last value.

(half) * (one third) * (one quarter) * * (two thousand nine hundred) * (one thousandth of two thousand) = one thousandth.

Answer question A correctly, and answer question B incorrectly, and get C score: C=5A-3B, A+B=24. That is C= 120-8B.

Minimum 8 points. 8= 120-8B, B= 14, that is, the lowest score, wrong 14, right 10, because everyone's score is different, so the highest score is wrong at most 5, right 19. The score should be at least C= 19*5-5*3=80.

10 people participated in the quiz, and each person had to answer 24 questions. Get 5 points for answering a question correctly and 3 points for answering a question incorrectly. As a result, the person with the lowest score will get 8 points, and everyone's score is different. How many points will the first place get at least? (80)

Time T A from a to b, time t b-t a from b to a = 8 hours. The distance between Party A and Party B is S = 20 * t a =15 * t b.

T b = 8+T A . S = 15 *(8+T A)= 20 * T A，T A =24 S=20*24=480。

A ship travels downstream at a speed of 20KM/h and downstream at a speed of 15KM/h. It takes 8 hours less for this ship to go from Jiayuan Port to B Port than from 1 Port to A Port and from B Port to A Port ... How many kilometers is there between A and B? (480)