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  2. GCE Ordinary Level in Sri Lanka - Wikipedia

    en.wikipedia.org/wiki/GCE_Ordinary_Level_in_Sri...

    It is usually taken by students during the final two years of Senior secondary school (Grade 10 & 11 (usually ages 15–16)) or external (non-school) candidate. The exam is usually held in December. The exams are held in three mediums Sinhala , Tamil and English .

  3. Sri Lankan units of measurement - Wikipedia

    en.wikipedia.org/wiki/Sri_Lankan_units_of...

    The smallest unit was known as "Paramaanuwa", which was equal to 3.306 × 10 −11 m (1.302 × 10 −9 in). A typical span was taken roughly equal to 22.86 cm (9 in). These small units of measurement were used in making of statues and buildings. Following are the relationships between the units used in ancient times. [6] [7]

  4. GCE Advanced Level in Sri Lanka - Wikipedia

    en.wikipedia.org/wiki/GCE_Advanced_Level_in_Sri...

    Students in Grade 13 had the second-highest depression and anxiety scores, with examination-related issues being the most commonly cited problem. Of the 445 students assessed, 22.9% of Grade 12 students and 28.6% of Grade 13 students reportedly had severe depression , while 28.6% of Grade 12 students and 32.1% of Grade 13 students experienced ...

  5. Arithmetic mean - Wikipedia

    en.wikipedia.org/wiki/Arithmetic_mean

    A weighted average, or weighted mean, is an average in which some data points count more heavily than others in that they are given more weight in the calculation. [6] For example, the arithmetic mean of 3 {\displaystyle 3} and 5 {\displaystyle 5} is 3 + 5 2 = 4 {\displaystyle {\frac {3+5}{2}}=4} , or equivalently 3 ⋅ 1 2 + 5 ⋅ 1 2 = 4 ...

  6. General average - Wikipedia

    en.wikipedia.org/wiki/General_average

    A form of what is now called general average was included in the Lex Rhodia, the Rhodes Maritime Code of c. 800 BC. [4] Julius Paulus quoted from the law around the turn of the 3rd century, and these quotes are preserved, and an excerpt is included in Justinian's 6th-century Digest of Justinian (part of the Corpus Juris Civilis), although the Lex Rhodia is itself now lost.

  7. Grade - Wikipedia

    en.wikipedia.org/wiki/Grade

    Grade most commonly refers to: Grading in education , a measurement of a student's performance Grade, the number of the year a student has reached in a given educational stage

  8. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called Cal Tech, whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...

  9. C. W. W. Kannangara - Wikipedia

    en.wikipedia.org/wiki/C._W._W._Kannangara

    Dr. Cristopher William Wijekoon Kannangara (Sinhala ආචාර්ය ක්‍රිස්ටෝෆර් විලියම් විජේකෝන් කන්නන්ගර; 18 October 1894 – 23 September 1969) was a Sri Lankan Lawyer and a politician.