Total distance = (2 1- 1) * 45 = 900.
= 180, that is, as long as it is an integer multiple of 180, don't touch it. 900/ 180=5 Except for the last one, there are still four in the middle.
Divide 23 by the sum of three different odd numbers, and * * * has (8) distributions. (enumeration)
The kindergarten has 1 15 candy, 148 cookies and 74 oranges, which are distributed equally to the children in the big class. As a result, there were seven more sweets, four more biscuits and two more oranges. How many children are there in the big class at least?
1 15-7= 108, 148-4= 144, 74-2=72
(108,144,72) = 36, and the minimum divisor of 36 greater than 7 is 9, so there are at least 9 people and at most 36 people.
The sum of dividend, divisor, quotient and remainder is 169, the known remainder is 1 and the quotient is 27, so the dividend is (136) and the divisor is (5).
In the final exam, Wang Fang's average score in Chinese, social science and mathematics was 87. If you add English and nature, the average score of five subjects is 89. It is known that nature is less than English 12, so how many points did you get in English and nature?
English+Nature = 5 * 89-3 * 87 = 445-261=184.
English =( 184+ 12)/2=98, natural =98- 12=86.
The circular track of the stadium is 400 meters long. Wang Ming and Li Hua set out from the same place in opposite directions at the same time. Wang Ming runs164m per minute, and Li Hua runs136m per minute. A few minutes later, they met for the third time.
400/(164+136) = 4/3, 4/3 * 3 = 4 minutes
199 1 subtract its 1/2, subtract the remaining 1/3, subtract the remaining 1/4, and so on until it is reduced to the remaining1199.
199 1*( 1- 1/2)*( 1- 1/3)*( 1- 1/4)...*( 1- 1/ 199 1)
= 199 1* 1/2*2/3*3/4*....* 1990/ 199 1= 1
Yesterday and today, the school canteen bought the same amount of vegetables and meat. I paid 250 yesterday and 280 today. The original price of vegetables increased by 10%, and the price of meat increased by 20%. So, I spent 200 yuan to buy vegetables today.