Posts Tagged ‘counterfeit coins’

you are given 3 piles of ten peso coins. 1 pile is made up of counterfeit coins,heavier than the genuine ones.?

you are given 3 piles of ten peso coins. 1 pile is made up of counterfeit coins,heavier than the genuine ones. explain how you can pick out the pile of counterfeit coins in one step procedure using an equal arm balance.… Continue reading

How do you answer this question? (chemistry related)?

You are given three plies of 10-peso coins. One pile is make up of counterfeit coins, heavier that the genuine ones. Explain how you can pick out the pile of counterfeit coins in a one-step procedure, using an equal alarm balance.… Continue reading

Scientific method question..please help me..you can simply answer the question..?

1) your friend does her own washing and develops skin rashes every time. she suspects the detergent as the cause of rashes. however, she gives up her suspicion when a neighbor using the same brand does not develop rashes.

a. is your friend being scientific in giving up her suspicion about the detergent as the possible cause of the rashes? explain your answer..

b.plan a way to test… Continue reading

Riddle! There are ten stacks of ten gold coins on a table…?

You are told the weight of the coins and guaranteed that nine of the stacks contain real gold coins. The tenth stack has all counterfeit coins that weigh exactly one gram more than a real coin. YOu are given a scale which weighs in grams and are told if you can determine which stack is counterfeit the nine stacks are yours. Unfortunately, you can only use the scale once! Describe… Continue reading

How could a test for density be used to separate counterfeit coins? How do vending machines do it?

Counterfeit Coin Logic Problem Variation?

You have 26 weights, one of them which is slightly lighter than the other 25. How would you determine the light weight in three separate weighings on a balance scale?… Continue reading

When confusion seems to surround you, can you still cast all your votes for dancing?

Cast all your votes for Dancing

I know the voice of depression
Still calls to you.
I know those habits that can ruin your life
Still send their invitations.

But you are with the Friend now
And look so much stronger.

You can stay that way
And even bloom!

Keep squeezing drops of the Sun
From your prayers and work and music
And from your… Continue reading

Probability and divisible by questions help please!!?

A.) Five counterfeit coins are mixed with nine authentic coins. If two coins are drawn at random, what is the probability that one coin is authentic and one is counterfeit?

B.) What is the sum of the integers between 1 and 300 that are divisible by 11, 13 or both?… Continue reading

Using D= M/V ….?

Using D= M/V, does that help detect counterfeit coins? Do Canadian Mint coins density differ from year to year? Can anybody tell me some more information about this?… Continue reading

Super hard Math for extra Credit?

So I just started school and on my first day my math teacher gave us 2 extra credit problems. They are so hard, my parents can’t even figure them out. And we haven’t covered them either so its not like I haven’t been paying attention. Can you help/explain them?

#1 Ten money bags contain silver dollars. Even though the coins look exactly the same, one of the bags is… Continue reading