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30 is a square pyramidal number. 30 is an even, composite, pronic number.With 2, 3, and 5 as its prime factors, it is a regular number and the first sphenic number, the smallest of the form , where r is a prime greater than 3. It has an aliquot sum of 42; within an aliquot sequence of thirteen composite numbers (30, 42, 54, 66, 78, 90, 144, 259, 45, 33, 15, 9, 4, 3, 1, 0) to the Prime in the 3 ...
This timer silently counts down to 0:00, then alerts you that time is up with a gentle beep sound.
The meaning of THIRTY is a number equal to three times 10. How to use thirty in a sentence.
30 (previous 29, next 31) The cardinal number thirty. Alternative forms [edit] Aegean numerals: please add, if you can; Arabic (Eastern) numerals: ...
27. Number 30 is an even composite number that falls between 29 and 31 in the natural number sequence. Number 30 holds a special place in mathematics as an even composite number. It is formed by multiplying 2 and 15, and it falls between the prime numbers 29 and 31. Being composite, it has divisors other than 1 and itself, such as 2, 3, 5, and 10.
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Define 30. 30 synonyms, 30 pronunciation, 30 translation, English dictionary definition of 30. Noun 1. 30 - the cardinal number that is the product of ten and three thirty, XXX large integer - an integer equal to or greater than ten Adj. 1. 30 - definition of 30 by The Free Dictionary.
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number 30. Want to learn more? Find out which words work together and produce more natural-sounding English with the Oxford Collocations Dictionary app. Try it for free as part of the Oxford Advanced Learner's Dictionary app. noun. the thirties [plural] numbers, years or temperatures from 30 to 39.