30 (number)
30 (thirty) is the natural number following 29 and preceding 31.
In mathematics
30 is the sum of the first four squares, which makes it a square pyramidal number.
It is a primorial and is the smallest Giuga number.
30 is the smallest sphenic number, and the smallest of the form 2 × 3 × r, where r is a prime greater than 3. 30 has an aliquot sum of 42; the second sphenic number and all sphenic numbers of this form have an aliquot sum 12 greater than themselves. The aliquot sequence of 30 is 16 members long, it comprises (30,42,54,66,78,90,144,259,45,33,15,9,4,3,1,0)
Thirty has but one number for which it is the aliquot sum: the square number 841.
Adding up some subsets of its divisors (e.g., 5, 10 and 15) gives 30, hence 30 is a semiperfect number.
30 is the largest number such that all coprimes smaller than itself, except for 1, are prime.
A polygon with thirty sides is called a triacontagon.
The icosahedron and the dodecahedron are Platonic solids with 30 edges. The icosidodecahedron is an Archimedean solid with 30 vertices, and the Tutte–Coxeter graph is a symmetric graph with 30 vertices.
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Won't Get Fooled Again
by: The WhoWe'll be fighting in the streets
With our children at our feet
And the morals that they worship will be gone
And the men who spurred us on
Sit in judgement of all wrong
They decide and the shotgun sings the song
I'll tip my hat to the new constitution
Take a bow for the new revolution
Smile and grin at the change all around
Pick up my guitar and play
Just like yesterday
Then I'll get on my knees and pray
We don't get fooled again
The change, it had to come
We knew it all along
We were liberated from the fold, that's all
And the world looks just the same
And history ain't changed
'Cause the banners, they are flown in the next war
I'll tip my hat to the new constitution
Take a bow for the new revolution
Smile and grin at the change all around
Pick up my guitar and play
Just like yesterday
Then I'll get on my knees and pray
We don't get fooled again
No, no!
I'll move myself and my family aside
If we happen to be left half alive
I'll get all my papers and smile at the sky
Though I know that the hypnotized never lie
Do ya?
There's nothing in the streets
Looks any different to me
And the slogans are replaced, by-the-bye
And the parting on the left
Are now parting on the right
And the beards have all grown longer overnight
I'll tip my hat to the new constitution
Take a bow for the new revolution
Smile and grin at the change all around
Pick up my guitar and play
Just like yesterday
Then I'll get on my knees and pray
We don't get fooled again
Don't get fooled again
No, no!
Yeaaaaaaaaaaaaaaaaaaaaaaaaah!
Meet the new boss
Same as the old boss
Latest News for: 30th
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Public Technologies 20 Mar 2025Wilson scores 30th goal, Capitals pull away from Red Wings
NHL 19 Mar 2025I’ll leave nothing out there in quest for 30th North West 200 win, says Alastair Seeley following Supersport d
Belfast Telegraph 19 Mar 202530th Annual Delta Symposium, ‘It’s about Time,’ Scheduled for April 9-11 (Arkansas State University)
Public Technologies 19 Mar 2025Popular ‘90s rock band to reunite without frontman for 30th anniversary
The Post-Standard 19 Mar 2025Darts results: Gary Anderson wins his 30th Players Championship title in Hildesheim
Sporting Life 18 Mar 202530th Sasol Marathon taking place in Sasolburg on 29 March 2025 (Sasol Ltd)
Public Technologies 18 Mar 2025Swimming season coming to an end – 30th March (Upper Lachlan Shire Council)
Public Technologies 17 Mar 2025Fox News at Nine marks 30th anniversary with past and present anchors
my SA 17 Mar 2025- 1
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