random numbers
B2neutral, technical
Definition
Meaning
A sequence of numbers whose occurrence lacks any predictable pattern or order, often generated by a process governed by chance.
In mathematics, computing, and statistics, numbers selected from a set where each number has an equal probability of being chosen, crucial for simulations, cryptography, and statistical sampling.
Linguistics
Semantic Notes
The term is inherently plural and almost always used with a plural verb. It implies a lack of system or predictability. 'Random' here is an adjective modifying 'numbers'; the phrase functions as a compound noun.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling of related terms may differ (e.g., 'randomise' vs. 'randomize').
Connotations
Identical in both varieties. The technical/scientific connotation is primary.
Frequency
Slightly higher frequency in American English in computational/tech contexts due to industry concentration.
Vocabulary
Collocations
Grammar
Valency Patterns
VERB + random numbers (e.g., generate random numbers)ADJ + random numbers (e.g., pseudo-random numbers)PREP + random numbers (e.g., a sequence of random numbers)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “by the numbers (antonymic: doing things in a strict, predetermined order)”
Usage
Context Usage
Business
Used in risk modelling, Monte Carlo simulations for finance, and A/B testing.
Academic
Core concept in probability theory, statistics, and computational mathematics research.
Everyday
Discussing lottery draws, fair decision-making (e.g., drawing straws), or unpredictable events.
Technical
Fundamental in cryptography, algorithm design, scientific simulations, and random sampling.
Examples
By CEFR Level
- The lottery uses random numbers to pick the winner.
- The teacher chose students by using random numbers.
- We need random numbers for our board game to make it fair.
- The computer can generate a list of random numbers.
- Cryptographic security often relies on high-quality random numbers.
- The researchers used random numbers to select a representative sample for their survey.
- The algorithm's efficacy was tested across multiple runs with different seeds for random number generation.
- Pseudorandom number generators are deterministic but approximate true randomness for most practical applications.
Learning
Memory Aids
Mnemonic
Imagine a RANDOM NUMBER generator as a NUMBer machine that RAN DOMestically, producing unpredictable results.
Conceptual Metaphor
RANDOMNESS IS LACK OF CONTROL / PATTERN; RANDOM NUMBERS ARE (UNPREDICTABLE) RAW MATERIAL.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid calquing 'random' as 'рандомный' in formal contexts; use 'случайные числа'. 'Рандомный' is a strong IT slang borrowing.
- Do not confuse with 'произвольные числа', which can imply 'arbitrary' (chosen at will) rather than statistically random.
Common Mistakes
- Using a singular verb (e.g., 'The random numbers is...').
- Confusing 'random numbers' with 'any numbers' or 'arbitrary numbers' without the statistical property of equal probability.
Practice
Quiz
What is a primary characteristic of true random numbers?
FAQ
Frequently Asked Questions
No, they are typically 'pseudorandom', generated by deterministic algorithms that produce sequences which only appear random for practical purposes. True randomness requires a non-algorithmic physical source (e.g., atmospheric noise).
'Random numbers' have a specific statistical property of equal probability and lack of pattern. 'Arbitrary numbers' are simply chosen without a specific reason but do not necessarily satisfy the formal criteria of randomness.
Almost never. The phrase is inherently plural (e.g., 'These random numbers are...'). You could use a singular noun like 'a random number' if referring to one.
They are essential for creating encryption keys, nonces, and salts. If an attacker can predict the 'random' numbers, the cryptographic system can be completely broken.