Quant Flashcards
ratio of the length of the short diag to the long diag in a parallelogram
1:sqrt(3)
Slope:
ax+by=c
=(-a/b)
If length grows by factor x how much does the area grow?
x^2
[T or F] the product of even consecutive integers will always be divisible by 8
Yes, because consecutive even integers alternate between being divisible by 2 and 4
what are the sides of a 30-60-90 right triangle
x-x(sqrt3)-2x
A line with positive slope will always cross which quadrants?
I & III
A line with a negative slope will always cross which quadrants?
II & IV
In which scenario will a line only cross 2 quadrants
A line that passes through the origin
Mean of consecutive set
(last+first)/2
=median
Median of Consecutive Set
(last + first)/2
=mean
Sum of Consecutive Set
[(last+first)/2] * n
Number of Terms in Consecutive Set
[(last - first)/interval] + 1
Range of any set in which terms are different
> 0
Range of set in which terms are the same
=0
STD of a set in which terms are same
=0
bottom 40% of the set has average 20, top 60% of the set has average 40, can we find average of the whole set?
Yes, is weighted
=(0.4)(20)+(0.6)(40)
Set N > 2 with unique integers.
Difference between any 2 numbers in set N are equal
How many terms are in the set?
What iS STD?
Any. Terms are all the same
STD = 0 since all same
STD is a function of
Mean and distribution amongst the mean
Range is Given
Mean is Given
Can we find STD?
No
Mean = Range
Can we find Median?
No
Mean = Range
Can we find STD?
No
Set N has 3 terms: a,b,c
b = mean
what is median?
b
price increased 20% in year 1 increased 30% in year 2, what is the % difference from the original price
(20+30+(20*30)/100) = x%
By what % change will xy change if x increases 30% and y increases 20%
% change in xy = (1.3)(1.2)-1 = 56%