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| English | Sinhala |
| bank transit number | බැංකු සංක්රාන්තික අංකය (A unique bank registration number that a bank uses to identify itself) |
| complex number | සංකීර්ණ සංඛ්යාව (A number in the form a + bi, where a and b are real numbers and i = sqrt(-1) , so that bi is imaginary unless b = 0) |
| mobile phone number | ජංගම දුරකථන අංකය (The phone number for a mobile phone) |
| number sign | සංඛ්යා ලකුණ (The character) |
| ordinal number | ක්රමසංඛ්යාව (A number whose form indicates position in an ordered sequence of items, such as first, third, or twentieth) |
| Permanent Account Number | ස්ථිර ගිණුම් අංකය (A 10-character alphanumeric identifier issued by the Indian Income Tax Department to all taxable entities for taxation and identification purposes) |
| personal identification number | පෞද්ගලික හැඳුනුම් අංකය (A unique and secret identification code similar to a password that is assigned to an authorized user and used to gain access to personal information or assets via an electronic device) |
| serial number | අනුක්රමික අංකය (A number assigned to a specific inventory item to identify it and differentiate it from similar items with the same item number) |
| week number | සති අංකය (The weeks of the year are assigned a number from 1 to 52, called week numbers. When you turn on week numbers, they appear on the left side of the Date Navigator in Calendar) |