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Questions and answers by
M.A.
Questions (43)
The Main Hall on the college campus has four main levels, from the basement up to the third floor. The technology staff in the
1 answer
691 views
You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes
0 answers
479 views
You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes
0 answers
475 views
You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes
0 answers
456 views
You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes
0 answers
1,180 views
In the U.S., we often write dates such as July 4, 1776, as 7/4/76. In other countries, the month is given second and the same
3 answers
555 views
Andy and William work together to build a toy house. It will take William 5 hours and Andy 4 hours, or William 10 hours and Andy
2 answers
543 views
Suppose that Bill orders 8 pizzas, each with pepperoni (and possibly other toppings as well), and Howard orders 6 pizzas, each
0 answers
529 views
Suppose that Bill orders 8 pizzas, each with pepperoni (and possibly other toppings as well), and Howard orders 6 pizzas, each
0 answers
1,123 views
Suppose that Bill orders 8 pizzas, each with pepperoni (and possibly other toppings as well), and Howard orders 6 pizzas, each
0 answers
645 views
Bill likes pepperoni pizza, and Howard like sausage pizza. Both are willing to eat pizza with sausage and pepperoni both. They
2 answers
760 views
Andy and Kate are running around a 400-meter track. If they run in the same direction, Andy will pass Kate in 100 seconds. If
6 answers
819 views
A 9 percent salt-water solution is mixed with 4 ounces of an 18 percent salt-water solution in order to obtain a 15 percent
1 answer
602 views
Here's the latest from the UMW math department: Andy drove from Richmond to Boston at an average speed of 50 miles per hour. If
1 answer
952 views
How many ways are there to choose a three-digit lottery number? Note that numbers like 003, 014, 222, 232 or 123 are all
1 answer
451 views
Suppose T is a right triangle whose sides have lengths a, b, and c. Is it possible that each of a, b, and c is an odd integer?
Ye
1 answer
594 views
The digits of a two-digit number are reversed. When both these two-digit numbers are added, the result is 88, and when
2 answers
1,223 views
The sum of the first X consecutive even numbers is 930. Find X.
10 35 30 41 Explain your solution.
1 answer
776 views
A weighted coin has the property that the Heads comes up 60 percent of the time. On two flips of the coin, is it more likely
1 answer
1,007 views
Help! I pushed the wrong key, I guess.
I think I clicked on the cursor when it was at the "measure bar at the top of the page
1 answer
582 views
A crate's weight is 4 pounds more than one-third its weight. How many pounds does it weigh?
2 3 4 6 Explain.
1 answer
406 views
After three tosses of a fair die, which is more likely to come up: three distinct digits (e.g. 1,2,3), or three digits with at
2 answers
1,122 views
If the sides of a box all double in length, by how much does its volume increase?
By a factor of 2 By a factor of 4 By a factor
2 answers
713 views
Is it possible to put 44 marbles into 10 boxes in such a way that each box has a different number of marbles?
Answer: yes no
1 answer
453 views
Three regular six-sided dice are tossed in succession. What is the probability that all three outcomes are different?
Choose from
1 answer
519 views
I have no clue as to how to tackle this problem.
Two standard six-sided dice are rolled. The product of their outcomes is
2 answers
530 views
A group of five students needs to break into two smaller groups in order to tackle the two different assignments associated with
2 answers
780 views
A cylindrical can holds three equal-sized balls perfectly. Which is larger, the can's height or the can's circumference?
Height
1 answer
517 views
How many people do you need in a room in order to guarantee that there's a group of three people, each of whom has the same
1 answer
432 views
Four students fall asleep during class and, while asleep, the professor rearranges their notebooks so that when they wake up,
4 answers
573 views
How many people do you need in a room in order to guarantee that there is a pair of people who were born in the same month?
Choos
5 answers
459 views
Kurt has a number of turkeys to give out to needy people and is going to have two friends help him. Alex received half of the
1 answer
516 views
A landscaper dug holes. It takes him 1 hour to dig a hole 2 feet deep, 2 feet long and 2 feet wide. Assuming everything remains
5 answers
756 views
How many times does the number "9" appear in the page numbers of a 100-page newspaper? Choose from
the possible answers below. (
4 answers
617 views
Tom and Fred are inseparable twins. They are in a five-person club. How many ways can these five line up for a photo if Tom and
1 answer
680 views
Mary had some M&M candy. She ate one, then gave half of the remaining candy to Bill. She ate another candy, then gave 1/3 of the
6 answers
514 views
What is the next logical number in the following number sequence? and Why?
5, 8, 14, 26
9 answers
6,218 views
The road connecting two mountain villages goes only uphill or downhill. A bus always travels 15 mph uphill and 30 mph downhill.
1 answer
651 views
Two questions:
(1) In a class every boy is friends with exactly 3 girls. Every girl is friends with exactly 2 boys. There are
4 answers
994 views
A number of bacteria are placed in a glass. One second later each bacterium divides in two, the next second each of the
2 answers
1,658 views
How many numbers are in the string
57, 59, 61, 63,...1233? My friend calculated 588. I am too concrete in my thinking and did it
8 answers
582 views
I went to File/Print Area and selected Clear Print Area. Then I went to File/Print Preview and the far left column of itemized
3 answers
459 views
I have filled in an Excel spreadsheet.
On the far left column are itemized numbers from 1-619. When I print the document, the far
1 answer
935 views
Answers (20)
Thank you soo much for your help. We lived in Winnipeg for 2 1/2 years. It was a great experience, but gave us a new respect for 30 degrees below zero winters. Having come from the deep south it was a huge adjustment. Now living again in the deep south
Thank you Dr. Russ. I am so thrilled with your answer. It is the first time I have had an answer that I can truly understand and comprehend, being a math-challenged individual. Thank you sooo much for your careful and complete explanation!
Thank you, Dr. Reiny!
Thank you for clarifying. You are dealing with a dense old lady this morning.
There is something wrong either with the problem or with the answer. The answer must be only one number. It cannot be 4 miles per second AND 6 miles per second. Explain, please.
thank you, Mr. Reiny.
But if one dice has a 6 face up and the other dice has a 1 face up, isn't that a product of 7?
Thank you!
I finally understand! Thanks for your explanation to this dense logic.
The question does not say that each person would have a different birthday month. I could invite 12 people to a party and there might be only 7 months represented for birthday months. Should I assume the question is limited by assuming each person to have
Thank you Dr. Reiny.
I am confused. You said in your first statement that his rate is 9 cubic feet/hour. But you also state that he can dig 8 cubic feet in 1 hour. I am assuming that if he can dig 8 cubic feet in 1 hour that it would take him 8 hours to dig 64 cubic feet. (64
Oh how simple! Thank you!
Thank you. I can follow the solution quite easily as explained, but I could never have come up with the solution from scratch other than just starting with numbers and trial and error. So how do you begin such a problem?
I understand it now. When the differences between the numbers doubles each time, then I add 24 to the final number of 26 = 50. Thanks so much for helping this mathematically challenged person!
I thought 24 would be the next number in the sequence, but I am being given a list of numbers, one of which is the correct answer. The choices of the correct answer are: 38, 40, 41, or 50
What is the answer and solution to #1?
In doing the Excel list, my column A589 has the number 1177 listed. In checking the list of real numbers again, I have found another major error. Thank you so much for your patient help in working with this mathematically challenged individual.But at least
I have actually printed out all of the numbers "57, 59, 61,63, all the way to 1233". There are 619 numbers. I double checked for errors that all of the numbers were correct. There are actually 619 numbers, for real. The mathematical formula you used does
How Cool!! It works! You are a lifesaver. Thanks. M.A.
