Search found 11 matches
2, 12, -5, 20, x, y For the list of numbers above, which of the following could be the range?
Problem Solving
Re: 2, 12, -5, 20, x, y For the list of numbers above, which of the following could be the range?
Assume that 20 is the largest number in the list. That means the range must be at least 25, making 32 the only possible answer. Therefore, C is correct.
- by dollydevashryee
Mon Sep 28, 2020 7:13 pm- Forum: Problem Solving
- Topic: 2, 12, -5, 20, x, y For the list of numbers above, which of the following could be the range?
- Replies: 2
- Views: 535
Jason can stack two shelves in 3 hours and Maria can stack three shelves in 2 hours. How long will it take them...
Problem Solving
Re: Jason can stack two shelves in 3 hours and Maria can stack three shelves in 2 hours. How long will it take them...
If Maria can stack 3 shelves in 2 hours, she can stack 4.5 shelves in 3 hours. In 3 hours, Jason and Maria can stack 6.5 shelves total. Therefore, it would take them 6 hours to stack 13 shelves. -> B
- by dollydevashryee
Fri Sep 11, 2020 11:34 am- Forum: Problem Solving
- Topic: Jason can stack two shelves in 3 hours and Maria can stack three shelves in 2 hours. How long will it take them...
- Replies: 3
- Views: 417
Re: Which of the following expressions can be written as an integer?
I. $$ \left(\sqrt{82}+\sqrt{82}\right)^2 = \left(2\sqrt{82}\right)^2 =\ 4\cdot 82 = integer $$
II. \(\sqrt{82}\) not an integer so \(82\sqrt{82}\) can't be an integer.
III. $$\frac{\sqrt{82}\cdot \sqrt{82}}{82} = \frac{82}{82}= 1 = integer$$
Therefore the answer is E -> I and III.
- by dollydevashryee
Sat Sep 05, 2020 2:59 pm- Forum: Problem Solving
- Topic: Which of the following expressions can be written as an integer?
- Replies: 2
- Views: 343
A grocery store purchased crates of 40 oranges each for $5.00 per crate and then sold each orange for $0.20. What was
Problem Solving
Re: A grocery store purchased crates of 40 oranges each for $5.00 per crate and then sold each orange for $0.20. What wa
For each crate, the grocery store would make $.2*40=$8. Each crate was purchased at $5, so the profit per crate would be the difference: $8-$5=$3 -> A
- by dollydevashryee
Sat Sep 05, 2020 2:53 pm- Forum: Problem Solving
- Topic: A grocery store purchased crates of 40 oranges each for $5.00 per crate and then sold each orange for $0.20. What was
- Replies: 1
- Views: 256
Re: Remainders
2 = 11*0 + 2
13 = 11*1 + 2
24 = 11*2 + 2
55 = 11*5 + 2
2, 13, 24 and 55 all have reminders of 2 when divided by 11. Therefore, E -> 185 must not have a reminder of 2 when divided by 11.
- by dollydevashryee
Sat Sep 05, 2020 2:47 pm- Forum: Problem Solving
- Topic: Remainders
- Replies: 2
- Views: 287
If 15 people contributed a total of $20.00 toward a gift and each of them contributed at least $1.00, then the maximum
Problem Solving
Re: If 15 people contributed a total of $20.00 toward a gift and each of them contributed at least $1.00, then the maxim
To get the maximum number one person can contribute, the remaining 14 must each contribute the minimum possible amount ($1). That means $14 in total are contributed by 14 people. Therefore, the maximum the remaining person can contribute is $20-$14=$6 -> D
- by dollydevashryee
Wed Sep 02, 2020 7:22 am- Forum: Problem Solving
- Topic: If 15 people contributed a total of $20.00 toward a gift and each of them contributed at least $1.00, then the maximum
- Replies: 2
- Views: 411
Re: If positive integers q and r are both even, which of the following must be odd?
An even number times an even number will always be even, and subtracting 1 from an even number will always be odd. Therefore, qr-1 will always be odd -> D
- by dollydevashryee
Fri Aug 28, 2020 11:36 am- Forum: Problem Solving
- Topic: If positive integers q and r are both even, which of the following must be odd?
- Replies: 1
- Views: 240
There are 8 job applicants sitting in a waiting room, 4 women and 4 men. If 2 of the applicants are selected...
Problem Solving
Re: There are 8 job applicants sitting in a waiting room, 4 women and 4 men. If 2 of the applicants are selected...
P(Both are women) = \frac{1}{2}\cdot \frac{3}{7}=\frac{3}{14} -> D
- by dollydevashryee
Fri Aug 28, 2020 11:32 am- Forum: Problem Solving
- Topic: There are 8 job applicants sitting in a waiting room, 4 women and 4 men. If 2 of the applicants are selected...
- Replies: 3
- Views: 306
At a certain store silk scarves are sold at an everyday price of 20% off the normal list price...
Problem Solving
Re: At a certain store silk scarves are sold at an everyday price of 20% off the normal list price...
Let the normal price = $100
Everyday price = $100 * .8 = $80
Extra 10% off everyday price = $80 * .9=$72
$72 is 72% of $100 -> D
- by dollydevashryee
Fri Aug 28, 2020 11:29 am- Forum: Problem Solving
- Topic: At a certain store silk scarves are sold at an everyday price of 20% off the normal list price...
- Replies: 1
- Views: 221
When positive integer x is divided by 20, the remainder is 8. What is the remainder when x is divided by 5?
Problem Solving
Re: When positive integer x is divided by 20, the remainder is 8. What is the remainder when x is divided by 5?
Easiest way to solve these questions is to plug in a number for x.
x = 8
8 % 20 = 8
8 % 5 = 3 -> B
- by dollydevashryee
Fri Aug 28, 2020 9:10 am- Forum: Problem Solving
- Topic: When positive integer x is divided by 20, the remainder is 8. What is the remainder when x is divided by 5?
- Replies: 4
- Views: 382
The number of boxes in a warehouse can be divided evenly into 6 equal shipments by boat or 27 equal shipments by truck.
Problem Solving
Re: The number of boxes in a warehouse can be divided evenly into 6 equal shipments by boat or 27 equal shipments by tru
Since the shipments are being divided equally by 6 and 27, we need the LCM of the two numbers.
LCM(6, 27) = 54 -> C
- by dollydevashryee
Thu Aug 27, 2020 6:38 pm- Forum: Problem Solving
- Topic: The number of boxes in a warehouse can be divided evenly into 6 equal shipments by boat or 27 equal shipments by truck.
- Replies: 3
- Views: 364