Weekly Assessment 2020-21

1.

• rational numbers are closed under multiplication.
• rational numbers are closed under addition.
• addition of rational numbers is not commutative.
• rational numbers are closed under division

2. Which of the following is not true?

• Rational numbers are closed under addition.
• Rational numbers are not closed under subtraction.
• Rational numbers are closed under multiplication.
• Rational numbers are not closed under division.

3. The additive inverse of -7/19 is

• -7/19
• 7/19
• 19/7
• -19/7

4. Multiplicative inverse of a negative rational number is

• a positive rational number.
• a negative rational number.
• 0
• 1

5. Between two given rational numbers, we can find

• one and only one rational number.
• only two rational numbers.
• only ten rational numbers.
• infinitely many rational numbers.

6.

• Less than x and y both.
• Between x and y
• Greater than x and y both.
• Less than x but greater than y.

7. A rational number can be represented in the form

• p + q
• pq
• p - q
• p/q

8.

• 16
• 8
• 1/16
• 1/8

9.

• 
• 
• 
• 

10.

• 5/2
• 2/5
• -5/2
• -2/5