Darkside

71 Questions
13 Answers

0

892

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a,b,c,d

abcd is a square. How many squares in the same plane have two or more vertices in the set {a,b,c,d} ?

Darkside Feb 4, 2019

0

2599

2

+296

A partition of a positive integer n is any way of writing as a sum of one or more positive integers, in which we don't care about the

A partition of a positive integer n is any way of writing as a sum of one or more positive integers, in which we don't care about the order of the numbers in the sum.
For example, the number 4 can be written as a sum of one or more read more ..

Darkside Feb 4, 2019

+1

2229

1

+296

The median of {20, x, 15, 30, 25} is less than the mean. If x is a whole number, what is the sum of all possible values of x ?

The median of {20, x, 15, 30, 25} is less than the mean. If x is a whole
number, what is the sum of all possible values of x ?

Darkside Feb 3, 2019

+2

3873

2

+296

A rectangular prism is being designed to have a volume of 36 cubic units.

A rectangular prism is being designed to have a volume of 36 cubic units. Find the minimum surface area in square units for the prism if the edge lengths are positive integers.

Darkside Feb 3, 2019

0

0

0

+296

An old book listed that 72 turkeys were bought

An old book listed that 72 turkeys were bought for $ _ . _ _ each, at a total cost of $ _ 67.9 _
What was the cost of each turkey, if each _ stands for a digit that was unreadable in the old book?
Note: The _ digits are not all the same. read more ..

Darkside Feb 3, 2019

+2

1303

1

+296

An old book listed that 72 turkeys were bought

An old book listed that 72 turkeys were bought for $ _ . _ _ each, at a total cost of $ _ 67.9 _
What was the cost of each turkey, if each _ stands for a digit that was unreadable in the old book?
Note: The _ digits are not all the same. read more ..

Darkside Feb 3, 2019

0

931

1

+296

Help Fast

A point (x,y) with integer coordinates is randomly selected such that 0 ≤ x ≤ 8 and 0 ≤ y ≤ 4. What is the probability that x + y ≤ 4 ? Express your answer as a common fraction.
Please give a detailed solution with every step. read more ..

Darkside Jan 2, 2019

+1

1013

8

+296

The previous solution does'nt help .

Please give me a detailed solution for the question
Let n > 18 be a positive integer such that n-1 and n+1 both are prime .
Prove that n has at least 8 different positive factors .

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Darkside Nov 10, 2018

+1

872

1

+296

Help Me

Please give me a detailed solution for the question
Let n > 18 be a positive integer such that n-1 and n+1 both are prime .
Prove that n has at least 8 different positive factors .

Darkside Nov 9, 2018