Quantitative Flashcards
What are the prime numbers from 1-40?
2,3,5,7,11,13,17,19,23,29,31,37
What are the rules of numbers divisible by 3?
If the digits in the number add up to a multiple of 3.
What are the rules of numbers divisible by 4?
If the final 2 digits would be themselves be divisible by 4. 2544 and 44 are both divisible by 4.
What are the rules of numbers divisible by 6?
If it is divisible by both 2 and 3
What are the rules of numbers divisible by 7?
Use long division to check it.
What are the rules of numbers divisible by 8?
If the final 3 digits by themselves would be divisible by 8. 2216 is divisible by 8 because 216 is divisible by 8.
What are the rules of numbers divisible by 9?
If the digits within the number add up to a multiple of 9. 495 is divisible because 4+5+9 = 18
What are the exponents of 2?
2, 4, 8,16,32,64,128,256,512,1024
What are the exponents of 3?
3,9,27,81,243,729
What are the exponents of 5?
5,25,125,625,3125
What are the exponents of 6?
6,36,216,1296
What are the exponents of 7?
7,49,343,2401
12x12=
144
13x13
169
14x14
196
15x15
225
20x20
400
25x25
625
30x30
900
40x40
1600
50x50
2500
100x100
10,000
What is the formula for the Sum of the Numbers?
(Average of the numbers)(number of numbers)=
What is the formula for the Average of the numbers?
=(biggest+smallest)/2
What is the formula for the Number of numbers?
=((biggest-smallest)/spacing)+1
What does x^2-25 factor out to?
(X+5)(x-5)
What is the square root of 2?
About 1.4
What is the square root of 3?
About 1.7
What is the square root of 5?
About 2.2
What is the percent formula?
(Is/of)=(percent/100)
What is the formula for percent change?
((New-old)/old)x100
What is 1/2 as a decimal?
0.5
What is 1/3 as a decimal?
1.3333333…
What is 2/3 as a decimal?
0.66666666…
What is 1/6 as a decimal?
1.66666…
What is 5/6 as a decimal?
0.83333…
What is 1/8 as a decimal?
0.125
What is 3/8 as a decimal?
0.375
What is 5/8 as a decimal?
0.625
What is 7/8 as a decimal?
0.875
