PROBLEM OF THE WEEK

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POW: 12-03-2018

Riddle:

Joe has ten coins totaling $1.19. From these coins, he cannot make exact change for a dollar, half-dollar, quarter, dime, or nickel.


What are the coins?

Answer:

A half-dollar, a quarter, four dimes, and four pennies.

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POW: 11-26-2018

Riddle:

A box of hardware contains nuts and bolts.  The bolts account for 25 percent of the number of items in the box.  What percentage are the bolts of the entire box.

Answer:

20 percent. For example, there are 10 bolts.  Since the number of bolts is 25 percent of the number of items, there must be 40 nuts. The total number of items = 10 bolts + 40 nuts = 50.  So, 10/50 = 1/5 = 20%.

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POW: 11-19-2018

Riddle:

A woman is walking down a street night at a constant pace.  As she passes the street light, she notices that her shadow becomes longer.  Does the top of her shadow move faster, slower or the same when the shadow is longer as when it is shorter?

Answer:

This point maintains a constant speed, independent of the lenght of the shadow.

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POW: 11-12-2018

Riddle:

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Answer:

The difference in age is 23 years, so I must be 23 if my father is twice as old as me.

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POW: 11-05-2018

Riddle:

What number squared = 12345678987654321?


 

Answer:

111,111,111

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POW: 10-29-2018

Riddle:

A 300 ft. train is traveling 300 ft. per minute must travel through a 300 ft. long tunnel.  How long will it take the train to travel through the tunnel?

Answer:

Two minutes. It takes the front of the train one minute and the rest of the train will take two minutes to clear the tunnel.

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POW: 10-22-2018

Riddle:

A half is a third of it. What is it?

Answer:

1 1/2.

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POW: 10-15-2018

Riddle:

Out of 100 ladies attending the dance,

85 had a white hand bag;
75 had black shoes;
60 carried an umbrella;
90 wore a ring;


How many ladies must have had all four items?


 

Answer:

10

Divide by 3. All the ladies had three items. The remainder shows the number of ladies who had 4.

85
75
60
90
______
310 / 3 = 100 + 10 remainder

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POW: 10-08-2018

Riddle:

If you have two hourglasses -- one four-minute timer and one seven-minute timer, how can you measure nine minutes?

Answer:

Turn over both hourglasses at once. When the four-minute hourglass runs out, turn it over. When the seven-minute hourglass runs out, turn it over. When the four-minute timer runs out this time (eight minutes have elapsed), the seven-minute hourglass has been running for one minute. Now turn over the seven minute timer back over. When the timer runs out, nine minutes have elapsed.

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POW: 10-01-2018

Riddle:

Pronounced as one letter, And written with three, Two letters there are, And two only in me. I'm double, I'm single, I'm black, blue, and gray, I'm read from both ends, And the same either way. What am I?

Answer:

An eye.

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To see more past Problem of the Week's refer to the Riddles Newsletter annals.