Rational Numbers Test

Result

Rational Numbers Test - 5

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which of the following options is incorrect?

A
If a/b and c/d are any two rational numbers, then (a/b) + (c/d) is also a rational number.

B
If a/b, c/d and e/f are any three rational numbers, then a/b + (c/d + e/f) = (a/b + c/d) + e/f.

C
If a/b is any rational number then a/b × b/a = 1.

D
If a/b, c/d and e/f are any three rational numbers,then a/b - (c/d - e/f) = (a/b - c/d) - e/f.

Solution

If a/b, c/d and e/f are any three rational numbers, then
a/b - (c/d - e/f)
= a/b - c/d + e/f
≠ (a/b - c/d) - e/f
Question 2
1 / -0

Fill in the blanks.

1. The reciprocal of 1/3 is __(a)__.
2. (2/3) ÷ (1/3) = (2/3) × (3/1) = __(b)__.
3. (5/9) × (2/9) = 10/81 is a __(c)__ number.
4. Multiplication of rational numbers is distributive over __(d)__.

A
a - 1, b - 0, c - negative, d - division

B
a - 3, b - 2, c - rational, d - addition

C
a - 3, b - 1, c - natural, d - division

D
a - 1, b - 0, c - positive, d - subtraction

Solution

1. The reciprocal of 1/3 is 3.
2. (2/3) ÷ (1/3) = (2/3) × (3/1) = 2.
3. (5/9) × (2/9) = 10/81 is a rational number.
4. Multiplication of rational numbers is distributive over addition.
Question 3
1 / -0

State T for true and F for false.

1. Two rational numbers can be added in any order.
2. While adding three rational numbers, they cannot be grouped in any order.
3. The reciprocal of 0 is undefined.
4. Every rational number multiplied with 0 gives 1.

A
1 - F, 2 - F, 3 - T, 4 - F

B
1 - T, 2 - T, 3 - T, 4 - F

C
1 - T, 2 - F, 3 - T, 4 - F

D
1 - T, 2 - F, 3 - F, 4 - T

Solution

1. Two rational numbers can be added in any order.
2. While adding three rational numbers, they can be grouped in any order.
3. The reciprocal of 0 is undefined.
4. Every rational number multiplied with 0 gives 0.