Home » General Knowledge (GK) MCQs » Maths GK MCQs

Amongst which of the following is the typical sign used to indicate the end of a proof?

16. Amongst which of the following is the typical sign used to indicate the end of a proof?

1. □ (a small square)
2. ⊓ (double up tack)
3. ► (right-pointing triangle)
4. All of the above

Answer

The correct answer is: D) All of the above

Explanation

All of the following symbols are routinely used to signal the end of a proof:

• □ (a small square): This is a conventional and well-known symbol for indicating the end of a proof.
• ⊓ (double up tack): Though less prevalent, it is yet employed as an "end of proof" symbol by some authors.
• ► (right-pointing triangle): This sign is used to indicate the end of a proof on occasion.

Different authors or Mathematical communities may prefer different symbols to mark the end of a Mathematical proof, but all of the options given are viable choices.