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I have never heard "a pair of ruler" but I wouldn't be surprised if someone on this planet said it that way.

Singular

I have a ruler.

Here, borrow my ruler.

Thank-you for lending me your ruler.

Plural

Teacher, I can lend John one of my three rulers.

John now has one ruler and I still have two rulers.

When John returns the ruler he borrowed from me, I will again have three rulers.

Others thought it was odd that I kept three rulers in my desk when most students only have one ruler.

Ruler as a person

A ruler is the head of a country. 9singular)

Historians have identified the early rulers of most nations. (plural)

While some people may say "pair of rulers" when they mean "two rulers of two different countries", it is better to use a number, such as "Countries could experience conflict if they had two rulers at the same time."

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Q: Do we say a pair of ruler or a ruler?
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Continue Learning about Natural Sciences

Which object would you need the fewest of to measure how long the eraser is?

I'll say a ruler . . . you can do that job with only one of them.


Do you have a ruler?

of course i dont i am the ruler of myself


What is a Metric ruler vs us RULER?

A metric ruler is a piece of wood or plastic, marked at millimetre intervals.The US ruler is called the president.


Why are there several types of glassware marked for measuring?

you can use a beaker,tripal bean balance,and a graduated cylinder......i was gana say a ruler but i am not sure...


What is Limit of precision?

The precision of something just means that the result can be repeated again and again. Everytime you repeat an experiment, you will get the same result. But that doesn't necessarily mean that the results are accurate! Your measurments, results, whatever can be very precise, but completely inaccurate. Accuracy is how close something is to the true value. For example, say I have a ruler. I have used this ruler to measure my table 10 times. Every time I measure the table, I get a measurement of 10ft. My measurement is very precise. However, what I don't know is that there is a fault with my ruler. The inches on my ruler are not true inches. Each inch may actually be only 1/9th of an inch. Or all the inches on my ruler may not even be the same. So while my measurements I took with my ruler 10 times are precise, they are not accurate because there is fault with my ruler. Something can be precise, but not necessarily accurate! I would say that this is the biggest limitation of precision. A precise measurement is not always a reliable one!