If x + 0 = 0 + x = x, which is rational number, then 0 is called
(a) identity for addition of rational numbers.
(b) additive inverse of x.
(c) multiplicative inverse of x.
(d) reciprocal of x.
. Multiplicative inverse of a negative rational number is
(a) a positive rational number.
(b) a negative rational number.
(c) 0
(d) 1
One (1) is
(a) the identity for addition of rational numbers.
(b) the identity for subtraction of rational numbers.
(c) the identity for multiplication of rational numbers.
(d) the identity for division of rational numbers.
Zero (0) is
(a) the identity for addition of rational numbers.
(b) the identity for subtraction of rational numbers.
(c) the identity for multiplication of rational numbers.
(d) the identity for division of rational numbers.
Which of the following is not true?
(a) rational numbers are closed under addition.
(b) rational numbers are closed under subtraction.
(c) rational numbers are closed under multiplication.
(d) rational numbers are closed under division
A number of the form p/q is said to be a rational number if
(a) p and q are integers.
(b) p and q are integers and q ≠ 0
(c) p and q are integers and p ≠ 0
(d) p and q are integers and p ≠ 0 also q ≠ 0.
A number which can be expressed as p/q where p and q are integers and q ≠ 0 is
(a) natural number. (b) whole number. (c) integer. (d) rational number.
The product of two rational numbers is –7. If one of the
number is –10, find the other.
Let O, P and Z represent the numbers 0, 3 and -5
respectively on the number line. Points Q, R and S are
between O and P such that OQ = QR = RS = SP.
What are the rational numbers represented by the points
Q, R and S. Next choose a point T between Z and O so
that ZT = TO. Which rational number does T represent?
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