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  2. List of Mersenne primes and perfect numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_Mersenne_primes...

    So, 6 is a perfect number because the proper divisors of 6 are 1, 2, and 3, and 1 + 2 + 3 = 6. [2] [4] Euclid proved c. 300 BCE that every prime expressed as M p = 2 p − 1 has a corresponding perfect number M p × (M p +1)/2 = 2 p − 1 × (2 p − 1). For example, the Mersenne prime 2 2 − 1 = 3 leads to the corresponding perfect number 2 2 ...

  3. Key Stage 3 - Wikipedia

    en.wikipedia.org/wiki/Key_Stage_3

    Key Stage 3 (commonly abbreviated as KS3) is the legal term for the three years of schooling in maintained schools in England and Wales normally known as Year 7, Year 8 and Year 9, when pupils are aged between 11 and 14. In Northern Ireland the term also refers to the first three years of secondary education.

  4. Note value - Wikipedia

    en.wikipedia.org/wiki/Note_value

    A number of dots (n) lengthen the note value by ⁠ 2 n − 1 / 2 n ⁠ its value, so two dots add two lower note values, making a total of one and three quarters times its original duration. The rare three dots make it one and seven eighths the duration, and so on.

  5. Kwame Nkrumah - Wikipedia

    en.wikipedia.org/wiki/Kwame_Nkrumah

    [61] [62] Nkrumah played a major role in the Pan-African conference held in New York in 1944, which urged the United States, at the end of the Second World War, to help ensure Africa became developed and free. [63] His old teacher Aggrey had died in 1929 in the US, and in 1942, Nkrumah led traditional prayers for Aggrey at the graveside.

  6. List of secondary education systems by country - Wikipedia

    en.wikipedia.org/wiki/List_of_secondary...

    In England, Wales and Northern Ireland, students usually transfer from primary school straight to secondary school at age 11, after year 6. School education is free until the end of year 13 (ages 17–18), and compulsory until the end of year 11 (ages 15–16), when students must 'participate' in education or training until their 18th birthday ...

  7. Battle of Naseby - Wikipedia

    en.wikipedia.org/wiki/Battle_of_Naseby

    The Royalists occupied a strong position on a ridge between the villages of Little Oxendon and East Farndon about 2 miles (3.2 km) south of Market Harborough. [13] The Royalist scoutmaster, Sir Francis Ruce, was sent out to find the Parliamentarian army and rode south for 2 or 3 miles (3.2 or 4.8 km) but saw no sign of it, perhaps through ...

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    free printable maths worksheets ks3 answer sheet 2nd section 6 pdf