Question

英语数学题（很急）

1.The following net is given:
Which one of the following cubes cannot be folded from this net?
2.The number of diagonals that can be drawn in a regular polygon with twenty sides (icosagon) is________
3.If a and b are integers,100⊙3=1,152⊙7=3,and then379⊙6 is equal to ________
4.Two numbers are in the ratio 2:3.When 4 is added to each number the ratio changes to 5:7.The sum of the two original numbers is_________
5.The greatest number of Mondays,which can occur in 45 consecutive days,is____________
6.Saul plays a video game in which he scores 4 for a hit and lost 6 for a miss.After 20 rounds his score is 30 .The number of times he has missed is __________
7.Three girls A,B and C run in a 100 m race.When A finishes,B is 10 m behind A and when B finishes,C is 20m behid B .How far in meters was C from A when A fjinished?
(Let’s assume all the athletes run at a constant speed)
8.The areas of the faces of a rectangular box are 84cm,70cm and 30cm.The volume of the box in cm is ___________.
9.You have 3 weights:1kg,3kg and 9kg as well as an equal arm balance,as shown.
How many different weight objects can you weigh with these three?
[Remember the weights may be placed on either side]
10.The sequence--------------then the 2007thnumber is ( ).What the sum of these 2007numbers?
11.The least natural number whose digits sum equals100,is____________
12.At10:30,the angle less than180 formed by hour and minute hand of a normal clock is__________

Answer 1

1,题不全
2,170
3,10
4,16 24
5,7
6,5
7,28
8,176400
9,16
10,题不全
11,9?
12,135.5

Answer 2

只有闲者才会帮你
第1题 没图;
第2题 170;
第3题 10/3+0=1,15/7+1=3;所以37/6+9=10;
第4题 40;
第5题 莫名奇妙;
第6题 5;
第7题 28;
第8题 176400 cm^3;
第9题 7; (就是问你3个砝码能有多少种组合,答:1,3,9,4,10,12,13)楼下的懂了吗?
第10题 没图;
第11题 1;
第12题 135度角

Answer 3

2.(n*(n-3))/2

Answer 4

汗 找个软件翻译下 自己去算 外语部好。。。