Saturday, 5 November 2016

line graph

Definition line graph:

line chart or line graph is a type of chart which displays information as a series of data points called 'markers' connected by straight line segments. It is a basic type of chart common in many fields.

line graph/line chart

histogram graph

Histogram Definition:

A diagram consisting of rectangles whose area is proportional to the frequency of a variable and whose width is equal to the class interval.
this has no spaces in-between unlike a normal graph.
histogram

Divisibility rules

a number is divisible by

If...........


Example: 

 2


the last number is even (0;2;4;6;8)

128 is divisible by 2
129 is not

 3


the sum of the digits is divisible by 3
 381 (3+8+1=12 and 12÷3=4) YES!
217 (2+1+7=10 and 10÷3=31/3) NO!

 4


the last two digits are divisible by 4 

1312 (12 ÷ 4 = 3)is divisible
 7019 is not

 5


the last digit is 0 or 5 

175 is divisible 
809 is not 

 6


The number is divisible by both 2 and 3 using the rule above 
114 (it is even, and 1+1+4=6 and 6 ÷ 3 =2 yes!) 

 7

Double the last digit and subtract it from a number made by the other digits. The result must be 0 or divisible by 7. (We can apply this rule to that answer again)
  • 672 (Double 2 is 4, 67-4=63, and 63÷7=9) Yes
  • 905 (Double 5 is 10, 90-10=80, and 80÷7=11 3/7No

 8


 The last three digits are divisible by 8
  • 109816 (816÷8=102) Yes
  • 216302 (302÷8=37 3/4No 


 9

The sum of the digits is divisible by 9
(Note: This rule can be repeated when needed) 
  • 1629 (1+6+2+9=18, and again, 1+8=9) Yes
  • 2013 (2+0+1+3=6) No 


 10


the number ends in 0 
220 YES!
221 NO!