Mathematics, 01.10.2019 04:30, KillerSteamcar

What is the fastest and easiest way to find hcf ( highest common factor)
and lcm ( lowest common multiple)

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If the small number is a factor of the larger then the GCF is the smaller number. In this case its easy and fast.
If the numbers are not in that form then one way is to find the prime factors of each number and find the GCF by comparing them

For example Find the GCF of 44 and 84:-

44 = 2 * 2 * 11
84 = 2 * 2 * 3 * 7

Pick out the common numbers . Here there are 2 pairs of the number 2 So the GCF = 2*2 = 4

LCM :- One way is to multiply the 2 numbers together and see if there is a lower number

For example:- LCM of 12 and 8
12 * 8 = 96 - divide by 2 gives 48 which is divisible by 6 and 8. Now try dividing by 2 again = 24 This also could be the LCM. Divide by 2 gives 12 but 8 will not divide into 12 so the LCM is 24.

THis is OK for relatively low numbers but for bigger ones you can use the method of prime factors.

for example:-

LCM of 88 and 16:;-

88 = 2*2*2*11
48 = 2*2*2*2* 3
Foe each duplicate 2 just use one 2 and also include the odd ones 2 , 3 and 11:_

LCM = 2*2*2*2*3*11 = 528

answered: Guest

the results from a pre-test for students for the year 2000 and the year 2010 are illustrated in the box plot. what do these results tell us about how students performed on the 29 question pre-test for the two years?

if we compare only the lowest and highest scores between the two years, we might conclude that the students in 2010 did better than the students in 2010. this conclusion seems to follow since the lowest score of 8 in 2010 is greater in value than the lowest score of 6 in 2000. also, the highest score of 28 in 2010 is greater in value than the highest score of 27 in 2000.

but the box portion of the illustration gives us more detailed information. the middle bar in each box shows us that the median score of 20 in 2000 is greater in value than the median score of 17 in 2010. further, we note that the box and whiskers divide the illustration into four pieces. each of these four pieces represents the same portion of students. so, the upper half of the students in 2000 scored in the same score range as the upper one-fourth of the students in 2010, see the illustration at a score of 20.

by considering the upper one-fourth, upper half, and upper three-fourths instead of just the lowest and highest scores, we would conclude that the students as a whole did much better in 2000 than in 2010. we would conclude that as a whole the students in 2010 are less prepared than the students in 2000.

in this section, we discuss box-and-whisker plots and the five key values used in constructing a box-and-whisker plot. the key values are called a five-number summary, which consists of the minimum, first quartile, median, third quartile, and maximum.

step-by-step explanation:

answered: Guest

step-by-step explanation:

it have 5 sides and 5 identicle angle.the rest does not have the same property as b.

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