All Questions

791

+16

bug in calculator?

HI,

Can anyone else reproduce this:
1. select the text "1" and copy it
2. open Calculator
3. switch to scientific view
3. type "10" <#> 4. press the "y^x" button <#> 5. paste; display now reads "1" <#> 6. hit enter; display read more ..

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spadekevin Jun 25, 2018

995

+16

Calculator Error

HI,

This is something that happened in math class today. If you enter the equation, (-27)^(2/3), into your calculator, you will get an error. However, this should not happen. What happens when the equation is expanded and read more ..

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spadekevin Jun 25, 2018

970

+16

Scientific notation

HI,

Out of boredom (and to put off studying) I decided to write a program to output Pascal's triangle, as well as calculate nCr. I started off using nats, but ran into a problem where the factorial function that I wrote would overflow read more ..

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spadekevin Jun 25, 2018

825

+279

deleted

delete

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yasbib555 Jun 25, 2018

494

geometry

Suppose that we are given 40 points equally spaced around the perimeter of a square, so that four of them are located at the vertices and the remaining points divide each side into ten congruent segments. If $P$, $Q$, and $R$ are chosen to be any three read more ..

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Guest Jun 25, 2018

2223

problem

A circular sheet of paper of radius 6 inches is cut into 3 equal sectors, and each sector is formed into a cone with no overlap. What is the height in inches of the cone?

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Guest Jun 25, 2018

Jun 24, 2018

477

Question about calculating chances

If I have a sequence of five symbols each taken from groups of three, I can simply make 3^5 (243) different sequences. In this case, I have a chance of 1/243 (0.4%) to get one exact sequence like ABCAC.

However, in my case the read more ..

Guest Jun 24, 2018

1049

+279

Let be a positive integer. What is the greatest possible value of ?

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yasbib555 Jun 24, 2018

655

+279

deleted

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yasbib555 Jun 24, 2018

1174

+198

HArd problem

[removed]

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Max0815 Jun 24, 2018

1181

What is the area, in square units, of the interior region formed by the lines $y = 4x - 6, y = -2x +12$ and the $y$-axis?

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Guest Jun 24, 2018

2284

Help

We call a number a mountain number if its middle digit is larger than any other digit. For example, 284 is a mountain number. How many 3-digit mountain numbers are there?

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Guest Jun 24, 2018

980

+753

Help!

For how many positive integers is a prime number?

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MIRB16 Jun 24, 2018

890

Standard equation of a circle

archeologist found the remains of an ancient wheel,which she placed on a grid.If an arc of the wheel passes through A(-7,0),B(-3,4),and C(7,0),locate the center of the wheel,and the standard equation of the circle defining its boundary.

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Guest Jun 24, 2018

1480

+753

Help!

Two sequences and are defined as follows: What is the remainder when is divided by 5?

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MIRB16 Jun 24, 2018

974

geometry

Trapezoid $ABCD$ has vertices $A(-1,0)$, $B(0,4)$, $C(m,4)$ and $D(k,0)$, with $m>0$ and $k>0$. The line $y = -x + 4$ is perpendicular to the line containing side $CD$, and the area of trapezoid $ABCD$ is 34 square units. What is the value of $k$? read more ..

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Guest Jun 24, 2018

1531

Let n be a natural number with exactly 2 positive prime divisors. Of n^2 has 27 divisors, how many does n have?

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Guest Jun 24, 2018

2100

Compute the value of such that

Compute the value of such that $\left(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\cdots\right)\left(1-\frac{1}{2}+\frac{1}{4}-\frac{1}{8}+\cdots\right)=1+\frac{1}{x}+\frac{1}{x^2}+\frac{1}{x^3}+\cdots$

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Guest Jun 24, 2018

539

The price of the latest incredible iThing from Apple starts at $200

The price of the latest incredible iThing from Apple starts at $200 when it is first released. Every year it gets better but the price goes up 8%. What is the price after 20 years? [You can see problems just like this one in the Gateway Exams read more ..

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Guest Jun 24, 2018

732

Steven bakes brownies

Steven bakes brownies for a Math 101 study group which has a total of 6 people in it (including himself). He realizes that no matter how many of them show up (as long as he's not the only one there) then after they share out the brownies read more ..

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Guest Jun 24, 2018

5155

If ABCDE x 4 = EDCBA what is the number ABCDE? As usual with this type of problem each letter is a digit and different letters represent

If ABCDE x 4 = EDCBA what is the number ABCDE? As usual with this type of problem each letter is a digit and different letters represent different digits.

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Guest Jun 24, 2018

684

Need help

Need help on working out the outside of the circles

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Guest Jun 24, 2018

2762

If it's 7:00 now, what time will it be in 1,000 hours?

If it's 7:00 now, what time will it be in 1,000 hours? [Don't worry about a.m. or p.m]
(Answer as a number; so if you think the answer is 3:00, enter 3 below).

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Guest Jun 24, 2018

661

In one state the license plates have 6 letters so:

In one state the license plates have 6 letters so:
"XRDFGT"
or
"HAPPPY" read more ..

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Guest Jun 24, 2018

555

HELP ASAP PLZ!!!!

Prove that if w,z are complex numbers such that |w| = |z| = 1 and wz =/ -1, then w+z / 1+wz is a real number.

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Guest Jun 24, 2018

All Questions ⁺⁰238211 Questions

bug in calculator?

Calculator Error

Scientific notation

deleted

geometry

problem

Question about calculating chances

Let be a positive integer. What is the greatest possible value of ?

deleted

HArd problem

What is the area, in square units, of the interior region formed by the lines $y = 4x - 6, y = -2x +12$ and the $y$-axis?

Help

Help!

Standard equation of a circle

Help!

geometry

Let n be a natural number with exactly 2 positive prime divisors. Of n^2 has 27 divisors, how many does n have?

Compute the value of such that

The price of the latest incredible iThing from Apple starts at $200

Steven bakes brownies

If ABCDE x 4 = EDCBA what is the number ABCDE? As usual with this type of problem each letter is a digit and different letters represent

Need help

If it's 7:00 now, what time will it be in 1,000 hours?

In one state the license plates have 6 letters so:

HELP ASAP PLZ!!!!

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