4 (number) facts for kids
Quick facts for kids
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|---|---|---|---|---|
| Cardinal | four | |||
| Ordinal | 4th (fourth) |
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| Numeral system | quaternary | |||
| Factorization | 22 | |||
| Divisors | 1, 2, 4 | |||
| Greek numeral | Δ´ | |||
| Roman numeral | IV | |||
| Roman numeral (unicode) | Ⅳ, ⅳ | |||
| Greek prefix | tetra- | |||
| Latin prefix | quadri-/quadr- | |||
| Binary | 1002 | |||
| Ternary | 113 | |||
| Senary | 46 | |||
| Octal | 48 | |||
| Duodecimal | 412 | |||
| Hexadecimal | 416 | |||
| Greek | δ (or Δ) | |||
| Arabic | ٤,4 | |||
| Persian | ۴ | |||
| Urdu |  |
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| Ge'ez | ፬ | |||
| Bengali | ৪ | |||
| Chinese numeral | 四，亖，肆 | |||
| Korean | 넷,사 | |||
| Devanagari | ४ | |||
| Telugu | ౪ | |||
| Malayalam | ൪ | |||
| Tamil | ௪ | |||
| Hebrew | ארבע (Arba, pronounced AR-bah) or ד (Dalet, 4th letter of the Hebrew alphabet) | |||
| Khmer | ៤ | |||
| Thai | ๔ | |||
| Kannada | ४ | |||
The number four is a very common number. It comes right after three and before five. In Roman numerals, we write it as IV.
Four in Math
In mathematics, four is an even number. This means you can divide it by two without any remainder.
It's also the smallest composite number. A composite number is a whole number that can be divided evenly by numbers other than 1 and itself. For example, 4 can be divided by 1, 2, and 4.
Four is also a square number. This means it's the result of multiplying a whole number by itself. In this case, 2 multiplied by 2 equals 4. So, 4 is the second square number after one.
If you multiply four by itself (four squared), you get 16. If you double four, you get 8.
Images for kids
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How the number 4 symbol has changed over time.
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Two modern handwritten fours.
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Four mugs of tea.
See also
In Spanish: Cuatro para niños
