Random Maths
What makes a prime number a prime number?
A prime number is a number greater than 1, and a number that is the product of 2 numbers. (if we ignore the negative number)
54n + 45
9(6n + 5)
s2 + 6s + 9
(s + 3) (s + 3)
(s + 5)2 + 9(s+5)
(s + 5) ((s + 5) + 4)
What is the Pythagorean theorem?
a2 + b2 = c2
100h - 75
25(4h - 3)
x2 - 13x + 30
(x - 10) (x - 3)
5(p - 9)6 + 7(p - 9)
(p - 9) (5(p - 9)5 + 7)
What is 2+3!
8, the three is factorial. (1*2*3)
49x3 + 77x3 + 84x3
7x3(7 + 11 + 12)
s6 + 7x3 + 12
(s3 + 4) (s3 + 3)
(xy - gf)2 + (gf - xy) (xy + 27)
= (xy - gf) ((xy - gf) + (xy + 27)
= (xy - gf) (2xy - gf + 27)
A small number of cards has been lost from a complete pack. If I deal among four people, three cards remain. If I deal among three people, two remain and if I deal among five people, two cards remain. How many cards are there?
There are 47 cards.
121hjq + 132qh
11qh(11j + 12)
x4 - 2tx2 + t4
(x2 - t2) (x2 - t2)
5(x + n)12 + (n - x) (x + n)11
(x + n)11 (5(x + n) + (n - x)
(x + n)11 (5x + 5n + n - x)
(x + n)11 (4x + 6n)