338 Answered Questions for the topic logic

Logic

08/23/17

One-tenth of the cars in a car park are yellow. Another car arrives and now one-ninth of the cars are yellow. How many cars are now in the car park?

One-tenth of the cars in a car park are yellow. Another car arrives and now one-ninth of the cars are yellow. How many cars are now in the car park?

06/28/17

Math/Logic question I can't find the correct answer anywhere

1+4=5 2+5=12 3+6=21 8+11=   I have seen 3 examples of answers people say are correct    Example 1 answer 96   1×4=4+1=5 2×5=10+2=12 3×6=18+3=21 8×11=88+8=96   Example 2 answer... more
Logic

06/23/17

TwO days ago i was 10 years old &will be of 13 next year if i am speaking the truth whats todays date

Options are 28 feb  29feb 31 dec Or 1 jan

06/16/17

Trying to recall a problem about balls.

There are 30 balls of 10 colors, 3 of each color. One of each 3 balls form the same color is fake. You are allowed to pass several balls, and see whether there are fake balls among them or not.... more
Logic

04/04/17

Let " n be a positive integer. Then show that 32n+1 + 2n-1 is multiple of 7 by using Mathematical Induction method

Soo need to know the steps in making this question work out . plz can any one help
Logic

03/23/17

A sound argument is a valid argument with no false premises

Logic phil 60
Logic

03/23/17

Every argument with a true premise is a sound argument

Phil 60 class
Logic

03/04/17

Q's . Using the rules of logic prove the following logical equivalence.

(p<--->q = ~(p and~ q) or ~(q and ~p)

Monster Costume Party

On Halloween, the favorite gathering place for movie monsters is Dracula's castle, site of the annual Monster Ball. The Count's intolerence of daylight limits his ability to shop for party items,... more

combinatorics and probability

A math quiz is generated by randomly choosing 5 questions from a test bank consisting of 50 questions. How many different quizzes are possible ? 
Logic Word Problem

10/11/16

Combinatorics and probability

A typical platoon consists of 20 soldiers. If there are 30 soldiers available to create a platoon. How many different platoons are possible? 

09/27/16

a car travels 720 miles in 12 hours. Express this as a unit rate

 a car travels 720 miles in 12 hours. Express this as a unit rate   how you solve this? 

Using Logical simplification

Could someone help me on the question below please.   Using Logical simplification, prove that the following are tautologies, contradictions or neither. Verify your answers using a truth... more
Logic

02/03/16

Fewest trips you can make

It is a family day at the creek. One of the most popular activities is the canoe Relay. Each team must have two  adults and three campers. In order to win this race you must canoe all team members... more

01/25/16

Proof by contrapositive: If n is even, then 2(n) is also even.

The contrapositive would be: If 2(n) is odd, then n is odd.   What is wrong with my logic?  The first statement is obviously true, and the second one is obviously false.  I know it must be... more

01/05/16

The sum of two numbers is 25. One number is 3 more than the other. What are the numbers?

Need explanation  
Logic Philosophy

12/04/15

Logic, MORAL THEORY

RELATIVISM?    AMERICAN CHILDREN SHOULD WEAR BRACES IF THEIR TEET ARENT PERFECT. THOUGH BRACES EXPOSE CHILDREN TO UNECESSARY PAIN AND MOST OF THE TIME, SERVE ONLY COSMETIC PURPOSES, WEARING... more

11/23/15

1) ?P(c = b?P(c)) 2) ?x( f (b) = x)) (note: ? means backwards E)

Suppose we have an FOL with names/constants a,b,c,d, variables x,y, z, function symbolsf (x),g(x),h(x,y), predicate symbols P(x),Q(x),R(x,y),x = y, the usual connectives and the quantifiers∀,∃. For... more

11/23/15

if R is a tautological consequence of P1, . . . ,Pn,P and also a tautological consequence of P1, . . . ,Pn,Q,

  then R is a tautological consequence of P1, . . . ,Pn,P∨Q. Explain this please..i don't understand       How could you use the result established above to give a careful justification for... more
Logic

09/11/15

If 2+3=25,4+9=169,7+3=100.find 5+6=?

This is a mcq question.it has four ans options only one is correct a) 99 b)121 c)64 d)144 according to me ans should be b) 121 as 5+6=11 and 11*11=121 but the mark scheme says that a) 99 is... more

07/03/15

A library has 2 books for every 5 resident. how many books do they need for a population of 12455 people?

This can eithe ne 24,910 or 4982 books
Logic

06/11/15

juice glasses

Six glasses are in a row. The first three are full of juice; the second three are empty. By moving only one glass, can you arrange them so empty and full glasses alternate?

02/22/15

LOGIC SYMBOLISM HELP!

Consider the following translation scheme:Use symbols to translateA: The American team will win a gold medal.B: The British team will win a gold medal.C: The Canadian team will win a gold medal. ... more

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