maths Quiz 1

Which rational number is the additive inverse of itself?

• -1

• 1

• 0

• ½

If a/b is a rational then its multiplicative (reciprocal) inverse is

• ab

• b/a

• -b/a

• -a/b

The reciprocal of 0 is

• A negative rational number

• A positive rational number

• 0

• Does not exist

  What should be added to -5/4 to get -1?

   

•  -1/4

• 1/4

• -3/4

•  1

Multiply 7/13 by the reciprocal of -7/16

• -16/13

• +16/13

• 3/16

• -13/16

Which of the following is not correct

• Integers are closed under subtraction and multiplication

• Whole number are closed under addition

• Natural number are closed under addition and subtraction

• Rational number are closed under subtraction and multiplication

Find:

-2/3 × 3/5 + 5/2 – 3/5 × 1/6

• 1

• 2

• 3

• 8

The product of two number is -16/35

If one the numbers is -15/14. Find other

• -32/75

• -8/3

• -2/5

• 32/75

-1/4 is rational number between

• -1 and 0

• -2 and -1

• 1 and 2

• 2 and 1

Multiplicative inverse of 0/7 is

• 7

• 0

• Not defined

• -7