All Questions

-1

954

1

+99

help

The figure below shows the composite developmental skill level of chessmasters at different ages as determined by their performance against other chessmasters. (From “Rating Systems for Human Abilities,” by W.H. Batchelder and R.S. Simpson, 1988. UMAP Module read more ..

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bigguy1989 May 28, 2018

0

681

2

+99

help

(a) lim x→5 √ ((x − 1) − 2)/ (x − 5)
(b) lim x→0 (sin(3x))/ (5x)

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bigguy1989 May 28, 2018

-1

937

5

+99

Are there many ways to solve this?

For travel from Washington DC to Baltimore by car, a constant speed of 60 mph was maintained. For the return trip, there was a constant speed of 50 mph. What was the average speed over the whole two-way trip?

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bigguy1989 May 28, 2018

0

1185

1

+168

Triangle

Question from a non calculator paper

The hypotenuse of a triangle is 15cm. Calculate the length of the shortest side.
read more ..

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Walthamx May 28, 2018

0

1411

1

+168

Finding missing number from median

0. 7. 2. 6. 9. 2. 0. 7.

Two more numbers are added. The median is 3.5 and the mode is 0.
read more ..

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Walthamx May 28, 2018

0

1168

1

+168

Length / Width

Work out the length and width of rectangle ABCD:

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Walthamx May 28, 2018

0

1098

1

+90

Calculating the vertical distortion of a wooden beam with a load on-top of it

Hi, so I am at dead-end with this, I have a rafter construction consisting of 466x140mm beams of laminated veneer lumber, now I have a terasse where there is a bout a 4420mm free span where some of the beams would be unsupported, the roof itself has read more ..

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SomeoneSomewhere May 28, 2018

0

859

2

Physics speed/acceleration

A rock is dropped from a bridge, When it's 1m from the water it takes 0.05 seconds to hit the water.
Calculate the height of the bridge.

(Air resistance is ignored) read more ..

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Guest May 28, 2018

0

726

1

i got 159981...i probably did something wrong.

The people living on the island of Gibberish use the standard Kobish alphabet ( letters, A through T). Each word in their language is 4 letters or less, and for some reason, they insist that all words contain the letter A at least once. How many read more ..

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Guest May 28, 2018

0

644

1

Factor as the product of four polynomials of degree 1, each of which has a positive coefficient of x

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Guest May 27, 2018

0

2871

6

+47

I got 8 possibilities...it is incorrect.

How many ways are there to assign each of 6 friends to either the chemistry class or the biology class if one of these six, Manoj, refuses to be in a class without any of his friends?

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lolzforlife May 27, 2018

0

9101

5

...

I have five apples and ten oranges. If a fruit basket must contain at least one piece of fruit, how many kinds of fruit baskets can I make? (The apples are identical and the oranges are identical. A fruit basket consists of some number of pieces of fruit, read more ..

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Guest May 27, 2018

0

1844

3

How many triples (a,b,c) of even positive integers satisfy ?

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Guest May 27, 2018

0

4399

3

+166

Help with modular arithmetic! Sorry about latex! :3

What is the residue of 9^2010, modulo 17?

How many zeroes does 10! end in, when written in base 11?
read more ..

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Creeperhissboom May 27, 2018

+19

3499

2

+3146

New Privacy Policy, May 2018

Hello,

this website was updated today because of some legal changes here in Europe. ("GDPR").
read more ..

off-topic

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admin May 27, 2018

0

2622

1

Help!

a) There are twice as many students in the math club as in the telescope club. Suppose there are $x$ students in the telescope club and $y$ students who are members of both clubs. Find an expression for the total number of students who are in the math read more ..

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Guest May 27, 2018

0

1129

1

+168

Triangle short side

The hypotenuse of the triangle is 15cm long.

Calculate the length of the shortest side.
read more ..

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Walthamx May 27, 2018

0

632

2

multiples of 3

What are the three digit multiples of 3?

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Guest May 27, 2018

0

2251

1

The three-digit number 'ab5' is divisible by 3. How many different three-digit numbers can 'ab5' represent?

The three-digit number "ab5" is divisible by 3. How many different three-digit numbers can "ab5" represent?

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Guest May 27, 2018

0

2348

2

too many combinations?

The product of the digits of 3214 is 24 How many distinct four-digit positive integers with unit digit not equal to 1 are there such that the product of their digits equals 18?

It seems like there are too many combinations for just read more ..

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Guest May 27, 2018

0

572

1

Tricky averages for Y6 pupils (aged 10 - 11)

Four children weigh themselves in pairs and take the average mass of each pair. The average mass of the six pairs are: 47kg, 50kg, 51kg, 53kg, 54kg, 57kg.
Find the mass read more ..

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Guest May 27, 2018

0

679

1

Please help

a) There are twice as many students in the math club as in the telescope club. Suppose there are $x$ students in the telescope club and $y$ students who are members of both clubs. Find an expression for the total number of students who are in the math read more ..

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Guest May 27, 2018

0

1547

1

How many ordered pairs (x,y) satisfy BOTH conditions below? Condition I: x=1 or y=0 or y=2 Condition II: x=0 or x=2 or x=1

How many ordered pairs (x,y) satisfy BOTH conditions below?
Condition I: x=1 or y=0 or y=2
Condition II: x=0 or x=2 or x=1

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Guest May 27, 2018

0

1591

1

help! I don't get how to do this

How many (non-congruent) isosceles triangles exist which have a perimeter of 10 and integer side lengths?

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Guest May 27, 2018

All Questions ⁺⁰237644 Questions

help

help

Are there many ways to solve this?

Triangle

Finding missing number from median

Length / Width

Calculating the vertical distortion of a wooden beam with a load on-top of it

Physics speed/acceleration

i got 159981...i probably did something wrong.

Factor as the product of four polynomials of degree 1, each of which has a positive coefficient of x

I got 8 possibilities...it is incorrect.

...

How many triples (a,b,c) of even positive integers satisfy ?

Help with modular arithmetic! Sorry about latex! :3

New Privacy Policy, May 2018

Help!

Triangle short side

multiples of 3

The three-digit number 'ab5' is divisible by 3. How many different three-digit numbers can 'ab5' represent?

too many combinations?

Tricky averages for Y6 pupils (aged 10 - 11)

Please help

How many ordered pairs (x,y) satisfy BOTH conditions below? Condition I: x=1 or y=0 or y=2 Condition II: x=0 or x=2 or x=1

help! I don't get how to do this

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