Which of the
following sentences are statements? Give reasons for your answer.
(i) There
are 35 days in a month.
(ii) Mathematics
is difficult.
(iii) The
sum of 5 and 7 is greater than 10.
(iv) The
square of a number is an even number.
(v) The
sides of a quadrilateral have equal length.
(vi) Answer
this question.
(vii) The
product of (–1) and 8 is 8.
(viii) The
sum of all interior angles of a triangle is 180°.
(ix) Today
is a windy day.
(x) All
real numbers are complex numbers.
Which of the following sentences are statements? Give reasons for your answer.
(i) There are 35 days in a month.
(ii) Mathematics is difficult.
(iii) The sum of 5 and 7 is greater than 10.
(iv) The square of a number is an even number.
(v) The sides of a quadrilateral have equal length.
(vi) Answer this question.
(vii) The product of (–1) and 8 is 8.
(viii) The sum of all interior angles of a triangle is 180°.
(ix) Today is a windy day.
(x) All real numbers are complex numbers.
(i) This sentence is
incorrect because the maximum number of days in a month is 31. Hence,
it is a statement.
(ii) This sentence
is subjective in the sense that for some people, mathematics can be
easy and for some others, it can be difficult. Hence, it is not a
statement.
(iii) The sum of 5
and 7 is 12, which is greater than 10. Therefore, this sentence is
always correct. Hence, it is a statement.
(iv) This sentence
is sometimes correct and sometimes incorrect. For example, the square
of 2 is an even number. However, the square of 3 is an odd number.
Hence, it is not a statement.
(v) This sentence is
sometimes correct and sometimes incorrect. For example, squares and
rhombus have sides of equal lengths. However, trapezium and
rectangles have sides of unequal lengths. Hence, it is not a
statement.
(vi) It is an order.
Therefore, it is not a statement.
(vii) The product of
(–1) and 8 is (–8). Therefore, the given sentence is
incorrect. Hence, it is a statement.
(viii) This sentence
is correct and hence, it is a statement.
(ix) The day that is
being referred to is not evident from the sentence. Hence, it is not
a statement.
(x) All real numbers
can be written as a
× 1 + 0 × i.
Therefore, the given sentence is always correct. Hence, it is a
statement.
(i) This sentence is incorrect because the maximum number of days in a month is 31. Hence, it is a statement.
(ii) This sentence is subjective in the sense that for some people, mathematics can be easy and for some others, it can be difficult. Hence, it is not a statement.
(iii) The sum of 5 and 7 is 12, which is greater than 10. Therefore, this sentence is always correct. Hence, it is a statement.
(iv) This sentence is sometimes correct and sometimes incorrect. For example, the square of 2 is an even number. However, the square of 3 is an odd number. Hence, it is not a statement.
(v) This sentence is sometimes correct and sometimes incorrect. For example, squares and rhombus have sides of equal lengths. However, trapezium and rectangles have sides of unequal lengths. Hence, it is not a statement.
(vi) It is an order. Therefore, it is not a statement.
(vii) The product of (–1) and 8 is (–8). Therefore, the given sentence is incorrect. Hence, it is a statement.
(viii) This sentence is correct and hence, it is a statement.
(ix) The day that is being referred to is not evident from the sentence. Hence, it is not a statement.
(x) All real numbers can be written as a × 1 + 0 × i. Therefore, the given sentence is always correct. Hence, it is a statement.
