Exam Questions Flashcards

Question

Ppl list of customers who got perscriptions this month. What is the probability that one of the names is chosen from the group who is allowed refills? 1 the group of ppl with refills is 20% greater than the group without refills 2. 288 ppl have refills on the list what is the probability of refills is hte same question, what is the probability that a customer gets refills? Same as what percent of customers get refills, same as what is the ratio of those who get refills to total number of customers!

Answer 1

refills/refills+no refills, bc refills over total refills=1.2(no-refills) = x=1.2y A do not need 288 already have probability!!!! all piece of information number 1 1.2y/2.2y B. IF this was the question not the previous card when had 100 not 288, Ys do not cancel!!! how it would be different, this odesn't cancel you cannot simplify this is really a ratios or percentage question!!!

Answer 2

so you have to frame this is B+J less than or equal to 10 1. not sufficient- could be anything 2. not sufficient could be anything now put them together B=J+4 B=2J 2J=J +4 J=4, B=8 so answer is no and that is sufficient to answer the question answer is C bc it costs 12, and they dont have enough money

Answer 3

a can't be zero B+C has to be greater than 10 bc carry the 1 that is the only way A+B would be B so B+C>10 so D has to be 1, bc three digit numbers can't be greater than 2,000 if added together so D has to be 1 so you should know that if B+A+1= units digit of B then A+1 must equal 10 only way to get back to units digit of B Answer A

Answer 4

=37/100 turn decimals into fractions bc square root of 100 is 10 square root of 100 is 10, one number if x squared is 100 you are taking square root of both sides, if you are taking the square root of both sides you have to account for possibility x could be 10 or negative 10

Answer 5

Total distance 60/total time 50/x + 10/y= weighted average!

Answer 6

between the two of them does mn have 4 2s? - when combine numbers are just strings or molecules molecules in this case are just prime factors 1. tells us nothing besides n is multiple of 5 2. m has to be divisible by 16 so m has to be even! m could be 8, m has to be a multiple of 8 tells us thats it answer E not enough information answer is E

Answer 7

strategy almost always plug in!!! 1. N could be 8, n could be 14 multiple 6 and add 2 technically translates as piece of information number 1 translates as N = 6x+2 N = 8, 14, 20, 26 all divided by 3 give remainder of 2 all divided by 3 give remainder of 2! 8/3 goes in twice 6 plus 2, 14,/3 so 12 plus 2 2. N =4x+2 different remainders for all of them 6/2 has 0 remainder 6/3=2 no remainder, 10/3 remainder 1, 14/3 remainder 2, ALL DIFFERENT so answer is A, 1 is sufficient plug in numbers

Answer 8

1. if R-s is even then R+S has to be even- answer is A sufficient in ever circumstance where R-S is even R+S is always always even!!!!!! 2. R even S odd R od S even R even S even 2 is insufficient 0 is an even integer IF R XS is even R+X could be even but R+S could also be odd so in that case it is insufficient

Answer 9

1. is insufficient too many options bc 11X13X7=1001 but 5X7X11=385 so not sufficient 2. this just tells me p doesn't have a 2, 7, 5*** because if it did than they would be multiples, not enough by itself so insufficient so take out 2, 7, 5 3X11X13= 429 so yes less than 700 Answer is C together sufficient common multiple= multiple divisible by each of those numbres, which again just means a number that shares prime factors with each of those numbers, lets take 140

Answer 10

multiple divisible by each of those numbres, which again just means a number that shares prime factors with each of those numbers, lets take 140 when talking about multiples and factors all you are talking about is shared prime numbers!! if you are talking about multiples adn factors, all you are talking about is collection of primes in each number signature of primes each number has whether they share that signarture, they don't share that signature the degree to which they share the signature that is all that is a common factor is just whatever collection of primes they have in common, common multiple is number with full collection of all their primes*** if x has a 2 or P from previous question, if P has a 2 then that number and 70 have a common multiple somewhere in the ether that has so no matter when they say they if P and 70 do not have a common multiple they avoid each other always in number line so no number any prime factor divisible by each of them****

Answer 11

a common factor is just whatever collection of primes they have in common, common multiple is number with full collection of all their primes*** the greatest common factor is the intersection of two sets of prime factors and the least common factor is hte union,

Answer 12

in world of venn diagrams talking about total equals lcm here

Answer 13

also known as greatest common disivior for product multiply all factors together from on top of the circles, smash them together that gets product LCM smash factors in circles together

Answer 14

do with weighted averages!!!!

Answer 15

focus exam practice test 2 Q5

Answer 16

Quant Q. 6