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GCSE: Sliding Puzzle
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- Develop your confidence and skills in GCSE Maths using our free interactive questions with teacher feedback to guide you at every stage.
- Level: GCSE
- Questions: 75
SAMPLE SIZE: Taking a fixed percentage out of the 1183 students uses a sample size. For example 10% is taken from the whole school. You would end up with 118 students. On the other hand a percentage sample can be taken if the school is divided in strata. For example, if 10% is taken from every year group: Year group Total number of students Sample of 10% 7 282 282 x 0.1= 28.2 8 270 270 x 0.1 = 27 9 261 261 x 0.1 = 26.1 10 200 200 x 0.1 = 20 11 170 170 x 0.1 = 17 From this we learn how many pupils need to be taken from each year group.
- Word count: 1731
* Liquid crystals can transmit and change polarized light. * The structure of liquid crystals can be changed by electric current. * There are transparent substances that can conduct electricity. Most simple LCD's emit no light of their own, they depend on light reflected back off the rear surface or that of a back light which once again reflects off of the rear panel. There are two main types of LCDs used in computers, passive matrix and active matrix. Passive-matrix LCDs use a simple grid to supply the charge to a particular pixel on the display.
- Word count: 735
Formulae C= 4 S = (A - 1) 2 N = 4(A - 1) I have also discovered that the spacer (S) is increasing in square numbers. I must also state that the letter (A) represents the arrangements. However when this letter is in formulae, you must take the first number of the arrangement in order to work out either (S) or (N). I have discovered that (N) increases by 4 when the arrangements are in order. By using the formulae I am able to find out the following arrangements shown in the table and the diagrams.
- Word count: 879