122/7= 17 Yu 3, June 1 day is Tuesday, so the national day is Friday (2+3=5).

2. Every hour is 60 minutes, so 10000 minutes = 10000/60=500/3 hours.

Every day is 24 hours, so 500/3 hours =500/3/24= 125/ 18 days =6 days, 22 hours and 40 minutes.

1988 is a leap year, so February is 29 days, so the game ends on March 5 10: 40.

3. Male1-11-1-5/11.

Female1-12-1-5/11.

The remaining boys are1-11=10/1/and the remaining girls are10//.

Since a * * * has 156 people, the total number of boys plus 5/ 1 1 of boys equals 256- 12.

Then the number of boys is (156-12)/(1+5/1) = 99.

The number of girls is 156-99=57.

4. Suppose that the length of 6 hectares of land is 300 meters =30000 centimeters and the width is 200 meters =2000 decimeters.

Then 30000/ 15=2000 can be inserted into 300 meters.

200 meters can be inserted into 2000/ 1=2000,

Then 6 hectares of paddy fields can be planted with 2,000 * 2,000 = 40,000,000 seedlings.

5. The second time I bought 75-50=25 kilograms more than the first time.

Then the price per kilogram of rice is 55/25=2.2 yuan/kg.

It cost 2.2*(50+75)=275 yuan to buy rice twice.