Interview Math Flashcards
1/3
33.3%
1/4
25%
1/5
20%
1/6
16.6%
1/7
14.28% = ~14%
1/8
12.5%
1/9
11.1%
1/10
10%
1/11
9%
1/12
8.3%
1/16
6.25%
1/32
3.125%
Rule of 72
Approximates how long it will take for an investment to double. To use this rule, divide 72 by the annual rate of return.
Ex. if the rate of return is 2%, it would take 36 years for an investment to double
Rate of return is 3%
Est. # of years too double an investment?
24 years
Rate of return is 5%
Est. # of years too double an investment?
15 years
Rate of return is 7%
Est. # of years too double an investment?
10.3 years
Rate of return is 9%
Est. # of years too double an investment?
8 years
Rate of return is 12%
Est. # of years too double an investment?
6 years
Rate of return is 25%
Est. # of years too double an investment?
2.9 years ~ 3 years
Rate of return is 50%
Est. # of years too double an investment?
1.4 years
Rate of return is 72%
Est. # of years too double an investment?
1 year
Rate of return is 100%
Est. # of years too double an investment?
0.7 years
How many millions in a billion?
1,000
How many thousands in a million?
1,000
How many billions in a trillion?
1,000
How many millions in a trillion?
1,000,000
How many thousands in a billion?
1,000,000
9 x 13
117
9 x 14
126
9 x 15
135
9 x 16
144
9 x 17
153
9 x 18
162
9 x 19
171
9 x 20
180
8 x 13
104
8 x 14
112
8 x 15
120
8 x 16
128
8 x 17
136
8 x 18
144
8 x 19
152
