The exact boundary between primary and secondary education also varies from country to country and even within them, but is generally around the seventh to the tenth year of schooling.

The exact year of his birth is debated, with most biographers citing the year as 1467.

The exact year is also unknown ( on the first page of Narrative of the Life of Frederick Douglass, an American Slave, he stated: " I have no accurate knowledge of my age, never having seen any authentic record containing it.

The exact day and year of his birth are unknown ; he is believed to have been born into slavery in Missouri in January 1864.

The first recorded use of imperial blue as a color name in English was in the 1820s ( exact year uncertain ).

The exact time in the middle of the year is at noon, or 12: 00 p. m.

In the UK and other countries that use " Summer Time " the actual exact time of the midpoint in a common year is at 1: 00 p. m. this is when 182 days and 12 hours have elapsed and there are 182 days and 12 hours remaining.

The reason for this is that a year is not evenly divisible by an exact number of lunations, so without the addition of intercalary months the seasons would drift each year.

The Greek authorities were frustrated that he could not provide an exact estimate of the number of attendees more than a year in advance.

* Oslo, Norway is founded ( the exact year is debatable, but the 1, 000 year anniversary was held in the year 2000 ).

The exact date is unknown, but a surviving account book for the year ended 30 September 1604 proves it was built within the preceding 12 months.

As with many slaves in the United States, neither the exact year nor place of Araminta's birth was recorded, and historians differ as to the best estimate.

Dendrochronology can date the time at which tree rings were formed, in many types of wood, to the exact calendar year.

* The verge escapement, a simple type of escapement used in clocks, is invented ( exact year unknown ).

These calipers contain inscriptions of the exact day and year they were manufactured.

It still drops daily to mark the exact moment of 1 pm ( 13: 00 ) year round ( GMT during winter and BST during summer ).

In these times of ours, though concerning the exact year there is no need to be precise, a boat of dirty and disreputable appearance, with two figures in it, floated on the Thames, between Southwark Bridge which is of iron, and London Bridge which is of stone, as an autumn evening was closing in.

The eligibility period for the Foreign Language Film category differs from that required for most other categories: the awards year defined for the Foreign Language Film category usually begins and ends before the ordinary awards year, which corresponds to an exact calendar year.

The exact year depends on the year Thutmose ascended to the throne of Egypt and among scholars the estimates range from 1479 to 1504 BC.

This nettled the children into the revelation of exact truth, a sacrifice of their secret superiority over grown people, but a victory in the wide fields of perpetration and illegitimate accomplishment.

Authorities hesitate to quote exact figures, however, believing that any sum they come up with is only a surface manifestation -- turned up by their inevitably limited policing -- of the real loot of the medical racketeer.

Others suggest the alphabet was developed in central Egypt during the 15th century BC for or by Semitic workers, but only one of these early writings has been deciphered and their exact nature remains open to interpretation.

The alphorn's exact origins remain indeterminate, and the ubiquity of horn-like signal instruments in valleys throughout Europe may indicate a long history of cross influences regarding their construction and usage.

The traders did not divulge the exact location of their source and no European was able to deduce their location.

In the intervening years, the social world of music had seen dramatic changes: international publication and touring had grown explosively, concert societies were beginning to be formed, notation had been made more specific, more descriptive, and schematics for works had been simplified ( yet became more varied in their exact working out ).

The feigned retreat, next to unknown in Western Europe at that time — it was a traditionally eastern tactic — required both extraordinary discipline on the part of the troops and exact timing on the part of their commander.

For many years the Dodo and the Rodrigues Solitaire were placed in a family of their own, the Raphidae ( formerly Dididae ), because their exact relationships with other pigeons were unresolved.

Antoine built their home on the exact spot where the treaty was signed, as stipulated by Keokuk or he would have forfeited the land.

As with other geologic periods, the strata that define the start and end of the epoch are well identified, though their exact dates are slightly uncertain.

* Compulsory figures, in which skaters use their blades to draw circles, figure 8s, and similar shapes in ice, and are judged on the accuracy and clarity of the figures and the cleanness and exact placement of the various turns on the circles.

Others, angry at their sudden, apparently inexplicable defeat, joined up in an effort to put down Communist uprisings or exact some form of revenge ( see stab-in-the-back legend ).

Many almanacs list full moons not just by date, but by their exact time as well, usually in Coordinated Universal Time ( UTC ).

In the electron microprobe, individual locations are analyzed for their exact chemical compositions and variation in composition within individual crystals.

Despite the historical significance of Lincoln's speech, modern scholars disagree as to its exact wording, and contemporary transcriptions published in newspaper accounts of the event and even handwritten copies by Lincoln himself differ in their wording, punctuation, and structure.

Hatchlings were gray and downy, but their exact appearance is unknown, since no skins exist today.

It was widely believed that Richard had them murdered, although their exact fate remains a mystery.

The Impressionists sought to express their perceptions of nature, rather than create exact representations.

To make matters worse, many factions have not kept accurate records ( or any at all ) of the exact locations of their minefields, making removal efforts painstakingly slow.

The Supreme Court did not specify the exact wording to use when informing a suspect of their rights.

Rivalries among European powers enabled the Arab-Berber population, the Maures ( Moors ), to maintain their independence and later to exact annual payments from France, whose sovereignty over the Senegal River and the Mauritanian coast was recognized by the Congress of Vienna in 1815.

The related Abiriba ( Abiriba and Aro Are Brothers who's migration is traced to Ekpa Kingdom in East of Cross River ( their exact take of location was at Ekpa ( Mkpa ) east of the Cross river.

OBE models always leave the choice of the exact standards to the educational authority, so that families can influence the choice of standards according to their community's preferences.