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6–7 Clasa pregătitoare: compulsory 7–8 Clasa I: compulsory 8–9 Clasa II: compulsory 9–10 Clasa III: compulsory 10–11 Clasa IV: compulsory Gymnasium (Middle school) Age Grade Type 11–12 Clasa V: compulsory 12–13 Clasa VI: compulsory 13–14 Clasa VII: compulsory 14–15 Clasa VIII: compulsory Lyceum (Secondary School) Age Grade ...
Specifically, the division of the ecliptic in twelve equal sectors is a Babylonian conceptual construction. [7] This division of the ecliptic originated in the Babylonian "ideal calendar" found in the old compendium MUL.APIN and its combination with the Babylonian lunar calendar , [ 8 ] represented as the "path of the moon" in MUL.APIN.
When doing quick estimates, 3 is a rough approximation of π, 3.1415..., and a very rough approximation of e, 2.71828... 3 is the first Mersenne prime, as well as the second Mersenne prime exponent and the second double Mersenne prime exponent, for 7 and 127, respectively. 3 is also the first of five known Fermat primes, which include 5, 17 ...