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प्रश्न
Which of the following is not true?
विकल्प
Rational numbers are closed under addition.
Rational numbers are closed under subtraction.
Rational numbers are closed under multiplication.
Rational numbers are closed under division.
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उत्तर
Rational numbers are closed under division.
Explanation:
Rational numbers are not closed under division.
As, 1 and 0 are the rational numbers but `1/0` is not defined.
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संबंधित प्रश्न
Add the following rational numbers.
Evaluate each of the following:
Simplify each of the following and express the result as a rational number in standard form:
Find (x + y) ÷ (x − y), if
For each set of rational number, given below, verify the associative property of addition of rational number:
(ii) `(-2)/5, 4/15 and (-7)/10`
Insert three rational number between:
6 and 7
Insert three rational number between:
-5 and -4
Insert five rational number between:
`(2)/(5) and (2)/(3)`
Arrange the following rational numbers in ascending order.
`(10)/(9),(13)/(12) and (19)/(18)`
The table shows the portion of some common materials that are recycled.
| Material | Recycled |
| Paper | `5/11` |
| Aluminium cans | `5/8` |
| Glass | `2/5` |
| Scrap | `3/4` |
Arrange the rate of recycling the materials from the greatest to the smallest.
