All Questions

363

how to add

Find the sum of all 3-digit palindromes.

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Guest Aug 9, 2020

478

+30

REDACTED

REDACTED AS I GOT IT

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CoolMathWiz Aug 9, 2020

547

+19

I NEED HELP QUICK!!

As a prank, Tim decides to steal Nathan's fork at dinner, but so he doesn't get caught, he convinces other people to do it for him. On Monday, he convinces Joe to do it. On Tuesday, he could get either Ambie or John to do it. On Wednesday, he can't convince read more ..

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TheDummy Aug 9, 2020

407

need help

Solve for x.

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Guest Aug 9, 2020

471

geometry

In the figure, angle BAC = 85 degrees, CA = CB and BD = CD. Find the measure of x, y and z. Give reasons to support your answer.

read more ..

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Guest Aug 9, 2020

500

+30

Sum of values

If the highest common factor and the lowest common multiple of a, b and c are 2019 and 20190
respectively, find the sum of possible value(s) of a.

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CoolMathWiz Aug 9, 2020

575

+30

Casework

Bella, Aiden, Chris and Dylan join a math game competition. Each round 2 people among the 4 people are
randomly chosen to have a match. If after n rounds there must be at least two people matched at least four
times already, find the least value of read more ..

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CoolMathWiz Aug 9, 2020

448

+30

Percentage

A shop is selling a batch of goods and its selling price is set at an expected profit rate of 40%. After selling
80% of them, the shop sells the remaining goods at a discount. After selling the remaining goods at an x%
discount rate, the actual profit read more ..

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CoolMathWiz Aug 9, 2020

893

+223

Trig

A quarter-circle with radius 5 is drawn. A circle is drawn inside the sector, which is tangent to the sides of the sector, as shown. Find the radius of the inscribed circle.
read more ..

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envoy Aug 9, 2020

1878

+223

More trig

Luann has a platter made out of a square, with semicircles of diameter 10 inches on each edge, as shown. What is the side length of the smallest square that can contain the platter, in inches?
read more ..

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envoy Aug 9, 2020

698

+223

Trig problem

Quadrilateral PQRS is a trapezoid with bases and The median meets the diagonals and at X and Y, respectively. If SR = 20 and XY = 7, find PQ.
read more ..

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envoy Aug 9, 2020

311

please help

Which equation can be used to solve for x?

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Guest Aug 9, 2020

519

geometry problem

There are three squares inside the triangle . Find the area of the third triangle with steps , please

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Guest Aug 9, 2020

452

+41

Help

Ellen baked dozen cupcakes of which half contained chocolate, two-thirds contained raisins, one-fourth contained chocolate chips, and one-sixth contained nuts. What is the largest possible number of cupcakes that had none of these ingredients? read more ..

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OliverWood Aug 9, 2020

479

complex numbers

Simplify the following expression. (10-4i)(4-5i)+(-15+20i)

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Guest Aug 9, 2020

553

geometry

In the diagram, the vertices of the square lie at the centers of the four partial circles. What is the area of the entire shape?

read more ..

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Guest Aug 9, 2020

510

What?

Calculate sqrt{75x} sqrt{2x} sqrt{14x}. Express your answer in simplest radical form in terms of x.

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Guest Aug 9, 2020

396

help!

In how many 0's does 58! end when expressed in base 12.

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Guest Aug 9, 2020

Aug 8, 2020

802

+133

(a) Prove that given any 5 integers, there exist three of them whose sum is divisible by 3.

(a) Prove that given any 5 integers, there exist three of them whose sum is divisible by 3.
(b) Prove that given any 17 integers, there exist nine of them whose sum is divisible by 9.

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SpicyP Aug 8, 2020

496

+13

Please Help!

Let $A=(10,-10)$ and $O=(0,0).$ Determine the sum of all $x$ and $y-$coordinates of all points $Q$ on the line $y=-x+6$ such that $\angle OQA = 90^\circ.$

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BlueMoon0320 Aug 8, 2020

554

number theory question on modular inverse

Let n be a positive integer. If , what is the remainder when a is divided by 9?

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Guest Aug 8, 2020

284

please help

Find the volume of this pyramid.

Guest Aug 8, 2020

676

Help Quick!

Let a, b, c, and n be positive integers. If a + b + c = 19(97) and
a + n = b - n = c/n,
compute the value of a.

This question is number theory related

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Guest Aug 8, 2020

317

HELP ASAP

Let f(x) be a quadratic polynomial such that f(-4)=-22, f(-1)=2, and f(2)=-1. Let g(x)=f(x)^16. Find the sum of the coefficients of the terms in g(x) that have an even degree. (For example, the sum of the coefficients of the terms in -7x^3+4x^2+10x-5 that read more ..

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Guest Aug 8, 2020

344

help

A stick has a length of units. The stick is then broken at two points, chosen at random. What is the probability that all three resulting pieces are longer than unit?

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Guest Aug 8, 2020

All Questions ⁺⁰230576 Questions

how to add

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I NEED HELP QUICK!!

need help

geometry

Sum of values

Casework

Percentage

Trig

More trig

Trig problem

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geometry problem

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complex numbers

geometry

What?

help!

(a) Prove that given any 5 integers, there exist three of them whose sum is divisible by 3.

Please Help!

number theory question on modular inverse

please help

Help Quick!

HELP ASAP

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