MBA Deck Flashcards
How do you know if a number is divisable by 2, 3, 4, 5, 6, 7, 8, 9
2: Even
3: Sum of integer’s digits is divisible by 3
4: Divisible by 2 twice or last two digits are divisible by 4
5: Ends in 0 or 5
6: Integer is divisible by both 2 and 3
7: No Rules, Long Division
8: Divisible by 2 thrice or last three digits by 8
9: Sum of digits is divisible by 9
If you add multiples of a number, it is that sum a multiple of a number (T or F)
True
What are the first ten prime numbers?
2, 3, 5, 7, 11, 13, 17, 19, 23, 29
31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
The first prime number is 2 (T or F)
T, it is also the only even prime number
If A is a factor of B, and B is a factor of C, A is a factor of C (T or F)
T
27 is a factor of 72 (T or F)
F, prime factorization shows the digits are only 3, 3, 2, 2, 2. There is no way to make 27 from these digits
In 8 / 5. 8 is the dividend and 5 is the divisor (T or F) and What is the quotient?
T, 1
Dividend = Quotient x Divisor + Remainder
Dividend = Multiple of Divisor + Remainder
Even + or - Even = (Even or Odd)
Even
Odd + or - Odd = (Even or Odd)
Even
Even + or - Odd = (Even or Odd)
Odd
Even x Even = (Even or Odd)
Even
Even x Odd = (Even or Odd)
Even
Odd x Odd = (Even or Odd)
Odd
In Combinatorics, what does AND vs OR mean?
AND = Multiple Possibilities OR = Add Possibilities
In Combinatorics, arranging groups is done with what mathematical operator
N!
What is the difference if there are specific order vs non-specific order in Combinatorics
If there is a specific order then you utilize N!, if there is not a specific order, you have to divide N!/n!
eg) A local card club will send 3 representatives to the national conference. How many different groups of representatives could the club send
- 8!/(3!5!)
The yearbook committee has to pick a scheme for this year’s yearbook. There are 7 colors to choose from. How many color schemes can the committee pick if only 1 is choosen? If 2 are choosen?
1: 7!/(1!6!) = 7
2: 7!(2!5!) = 21
If two dice are rolled what is the total number of combinations of numbers?
6 AND 6 = 36
How to determine if a large number is prime?
Check 2 - 9 and all primes up to the square root of the number
If you add a multiple of N to a non-multiple of N, the result is a non-multiple of N (T or F)
T
If you add two non-multiples of N, the result is a non-multiple of N (T or F)
F - You don’t know
How do you find the GCF and LCM of numbers
GCF is the product of all shared primes, LCM is the product of all primes
If two numbers have no primes in common what is their GCF and LCM
GCF - 1
LCM - Numbers multiplied together
