LIVING IN THE CITY IS MORE COMFORTABLY THAN IN THE COUNTRY. A B C...

25. Living in the city is more comfortably than in the country.

A B C D

IV. Read the passage and then choose the correct answers

It is said that mathematics is the base of all other sciences, and that arithmetic, the science of

numbers, is the base of mathematics. Numbers consist of whole numbers (integers) that are formed by the

digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 and by the combinations of them. For example, 247 — two hundred and

forty seven — is a number formed by three digits. Parts of numbers smaller than 1 are sometimes

expressed in terms of fraction, but in scientific usage they are given as decimals. This is because it is

easier to perform the various mathematical operations if decimals are used instead of fractions. The main

operations are: to add, subtract, multiply and divide; to square, cube, or raise to any other power; to take a

square, cube, or any other root, and to find a ratio or proportion between pairs of numbers or a series of

numbers. Thus, the decimal, or ten-scale, system is used for scientific purposes throughout the world,

even in countries whose national systems of weights and measurements are based upon other scales. The

other scale in general use nowadays is the binary, or two-scale, in which numbers are expressed by

combinations of only two digits, 0 and 1. Thus, in the binary scale, 2 is expressed as 010, 3 is given as Oh,

4 is represented as 100, etc. This scale is perfectly adapted to the “off-on” pulse of electricity, so it is

widely used in electronic computers. Because of its simplicity it is often called “the lazy schoolboy’s

dream.”!