I found an answer from www.quora.com

**What is 1**+**1**? - Quora

There is a great old accountancy joke that answers this question: 'what do you need it to be?' However, it gets at my favourite Truth about a Mathematics - the ...

For more information, see **What is 1**+**1**? - Quora

I found an answer from www.quora.com

If **1** = **1**, then what is 1? - Quora

The Bellmen proceeds to hand the oldest brother 5 **one** dollar bills. The three
brothers look at each other and the 5 ones and decide to take back **one** dollar
each ...

For more information, see If **1** = **1**, then what is 1? - Quora

I found an answer from puzzling.stackexchange.com

riddle - When does **1**+**1**=3? - Puzzling Stack Exchange

The following slightly abuses the notion of "equals" but in a way that is common among non-mathematicians (more or less "And the next thing ...

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I found an answer from en.wikipedia.org

List of scale model sizes - Wikipedia

This is a list of scale model sizes, listing a variety of size ratios for scale models.
Model scales[edit]. Ratio, Inches per foot, Millimetres per foot, Comments. **1**: ...

For more information, see List of scale model sizes - Wikipedia

I found an answer from en.wikipedia.org

**1**+**1** - Wikipedia

**1** is a mathematical expression that evaluates to: 2 (number) (in ordinary
arithmetic); **1** (number) 0 (number) (in Boolean algebra with a notation where '+'
denotes ...

For more information, see **1**+**1** - Wikipedia

An equation that makes the number 2 by having 2 ones and a addition sign