# What does spade (♠) mean in scientific notation? [closed]

Example: $\spadesuit 3.5×10^2$

The Wikipedia page about scientific notation (permalink) didn't help. Neither did the "Val" template page (permalink).

Here's a screenshot of what shows up for me:

## closed as off-topic by Argon, Lord Shark the Unknown, user91500, Claude Leibovici, George LawSep 10 '17 at 11:01

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "This question is not about mathematics, within the scope defined in the help center." – Argon, Lord Shark the Unknown, Claude Leibovici, George Law
If this question can be reworded to fit the rules in the help center, please edit the question.

• Where did you see this symbol used? What was the context? – Argon Sep 10 '17 at 4:29
• Are you missing a font or something? – Batman Sep 10 '17 at 4:30
• @Argon It's linked in the question. I'll post the links again: en.wikipedia.org/wiki/Scientific_notation en.wikipedia.org/wiki/Template:Val – Wood Sep 10 '17 at 4:31
• I don't see that symbol on those pages. – Argon Sep 10 '17 at 4:33
• @Batman Maybe. If that's the case, I'll close the question. Any idea how to fix it? Do you not see the spade symbol? – Wood Sep 10 '17 at 4:33

## 1 Answer

You are probably missing a font that displays "Miscellaneous Technical" symbols in Unicode. The Wikipedia page has this boxed note in the right hand margin:

This article contains Unicode "Miscellaneous Technical" characters. Without proper rendering support, you may see question marks, boxes, or other symbols instead of "₁₀" (Decimal Exponent Symbol U+23E8 TTF).