The number of matchsticks that can be used to write 23 in roman system are,

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answer is B.

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Detailed Solution

Concept- Roman numerals, which are represented by the letters below, must be used to write the number 23 in the identified problem.
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Using the formula above, if a lower-denomination number comes after a higher-denomination number, the two will be added; if a lower-denomination number comes before it, the smaller number will be deducted from the higher one
The amount of matchsticks needed to write the number 23 in the Roman numeral system has been given to us. Roman numerals are known to be as follows:
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This will be the Roman numeral 23 that we shall use.
Roman numeral system: 23 =XXIII
We can also check to see if a number is followed by a lower denomination number. If a lower denomination number comes before it, the smaller number is removed from the higher number before the two are added.
⇒ XXIII =10+10+1+1+1=23
We now need to determine how many matchsticks will be required to write the number XXIII.
We require two matchsticks for X and one matchstick for I. Therefore, it is obvious that there are 7 matchsticks total, which equals 2+2+1+1+1.
Hence,option 2 is the correct answer.

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