英语翻译

英语翻译
1、Did you know?In the decimal number system (base 10) ten different digits,0 to 9,are used to write all the numbers.In the binary number system (base 2) two different digits are used,i.e.0 and 1.
Which one of the following numbers is not a valid number in the
octal number system (base 8)?
A) 128 B) 127 C) 126 D) 125 E) 124
3、The number of diagonals that can be drawn in a regular polygon with
twenty sides (icosagon) is_____.
4、If a and b are integers,10Ä3=1,152Ä7=3,and then 379Ä6 is equal to_____.
5、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____.
6、The greatest number of Mondays which can occur in 45 consecutive
days is____
7、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____.
8、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 20 m behind B.How far in metres was
C from A when A finished?
(Let’s assume all the athletes run at a constant speed)
9、The areas of the faces of a rectangulabox are 84 cm2 ,70 cm2and 30 cm2.The volume of the box in cm3 is____.
10、 You have 3 weights:1 kg,3 kg and 9 kg 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]