Math Games

Posts Tagged ‘math games logic puzzles’

Question: Math logic questions?

can you help with these?

1) The phone company has 25 computer controlled switching systems. Each system handles 700,000 calls an hour. Each system works correctly 95% of the time. How many calls WOULD NOT BE CORRECTLY handled in one 24 hour period, assuming each of the 25 systems was running at maximum capacity at all times?

2) If you got a 40% discount on a $159 pair of sport shoes and 20% off a $200 set of roller blades, what was the percent discount on the total purchase (assuming no taxes are involved)?

3) Five teams are playing in a tournament. Each teams plays each other team only one time. How many games will be played in all?

4) Can a farmer put 9 ostriches in 4 pens so that there is an odd number of ostriches in each pen and so that each pen has at least one ostrich?

5) What African animal do math teachers like best.

p.s. If you see that someone puts down an answer, don't just copy it becuz you think it's better than urs. Do what you think the answer is.

Answer: 1. multiply 700,000 and 25 to get 17,500,000 total calls an hour now multiply 17,500,000 by 5% .05 X 17,500,000 = 875000 so 875,000 calls are not correctly handeled each hour so multiply this by 24 to get how many are not correctly handeled in a day 875,000X24 =
ANSWER 21,000,000 calls are not correclty each day
2. find 40% of $159 so .4 X $159 =$63.60
now find 20% of $200 so .2X200=$40
ANswer you saved $103.60 total now add what you would have spent with out the discount to get $359 so
$103.60/$359 = .2886 so
ANSWER %28.86 percent on total purchase was saved
3. teams: A B C D E
Games: AB AC AD AE BC BD BE CD CE DE
Answer 10 games
4. idk are you putting half an ostritch in a pen that would be 18 ostritches in 4.5 or if you keep them whole ostritches 2.25 thus these numbers are not necessarily odd they are only not whole so i guess your answer would be yes but im not 100 sure
5. idk if you think about it long enough youll figure it out

Montessori Math Methods : The Bank Math Game in Montessori

Question: Help! I need a fairly simplistic math puzzle/trick for a presentation.??

I need a math trick/game for my math course......something that can be proven with a fairly simple proof.....Ive looked everywhere and most of teh stuff is logic problems...(which have ridiculously complex proofs...) it can be a card trick/dice/dominoes but again, not too in depth. This is for a college course but she said we can do even a kids math trick as long as its proven. Any suggestions/websites would be great....Ive done so much research already!!! arrrghhghh

Answer: How about this:

Pick any number (well, almost any. less than 2,222,209 & positive let's say.)
Add 14
Multiply by 9
Subtract 8
Add up all the digits
Add 5
Add up all the digits again
Subtract 6... You now have the number zero regardless of what number you picked first.

x
x+14
9x + 126
9x + 118
sum of digits of (9x + 118) ≡ 9x + 118 ≡ 1 (mod 9) *
1 + 5 = 6 (mod 9)
6 - 6 = 0

*You may be required to prove that the sum of the digits of a number mod 9 is the same as the number mod 9

Classic Game Room HD - PROFESSOR LAYTON and the DIABOLICAL BOX