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In mathematics, factorization (or factorisation, see English spelling differences) or factoring consists of writing a number or another mathematical object as a product of several factors, usually smaller or simpler objects of the same kind. For example, 3 × 5 is an integer factorization of 15, and (x – 2)(x + 2) is a polynomial ...
Squares are always congruent to 0, 1, 4, 5, 9, 16 modulo 20. The values repeat with each increase of a by 10. In this example, N is 17 mod 20, so subtracting 17 mod 20 (or adding 3), a 2 − N {\displaystyle a^{2}-N} produces 3, 4, 7, 8, 12, and 19 modulo 20 for these values.
If one of these values is 0, we have a linear factor. If the values are nonzero, we can list the possible factorizations for each. Now, 2 can only factor as 1×2, 2×1, (−1)×(−2), or (−2)×(−1). Therefore, if a second degree integer polynomial factor exists, it must take one of the values p(0) = 1, 2, −1, or −2. and likewise for p(1).
A primorial x# is the product of all primes from 2 to x. The first: 2, 6, 30, 210, 2310, 30030, 510510, 9699690, 223092870, 6469693230, 200560490130, 7420738134810 (sequence A002110 in the OEIS). 1# = 1 is sometimes included. A factorial x! is the product of all numbers from 1 to x. The first: 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800 ...
One ammonam was equal to 203.4 L. [1] One parrah = 1 ⁄ 8 ammonam, oneseer = 1 ⁄ 288 ammonam and the chundoo was equal to nearly half a pint. [2] Maccauly stated in 1818 that to the north of Colombo an Ammonam contained 16 Parahs, and 2 + 1 ⁄ 2 Ammonams equalled one Acre, but that to the south there were 8 Parahs to the Ammonam.
2005 – Old coin series of Sri Lanka Image Value Obverse Reverse Metal Diameter Weight Thickness Edge Year 25c Armorial Ensign Country name, year and value Copper-plated Steel 16.0 mm 1.68 g 1.2 mm Plain 2005 50c 18.0 mm 2.5 g 1.4 mm Plain Re. 1/- Brass-plated Steel 20.0 mm 3.65 g 1.7 mm Milled Rs. 2/- Nickel-plated Steel 28.5 mm 7.0 g 1.5 mm
These 50 companies alone account for about 75% of the total market capitalisation of the Colombo Stock Exchange. [1] On January 4, 2021, total market capitalisation crossed three trillion rupees mark for the first time. [2]
Services accounted for 58.2% of Sri Lanka's economy in 2019 up from 54.6% in 2010, industry 27.4% up from 26.4% a decade earlier and agriculture 7.4%. [41] Though there is a competitive export agricultural sector, technological advances have been slow to enter the protected domestic sector. [42]