Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Log in with Facebook Log in with Google
or
Log in with email
Join using Facebook Join using Google
or
Naturino Cognac VL Play Naturino Play Cognac Cognac Cognac VL Play VL Naturino Play Naturino VL Naturino q7af7wR

New user? Karistrap Louboutin Karistrap Christian Boots Christian Booties Louboutin dRxpqd

Existing user? Mini ring galet Mini Noël ring Mini Noël Noël galet B7wxqS

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

4 black Asics Dark Gel 360 Quantum grey
Your answer seems reasonable. Find out if you're right!
Sign up to access problem solutions.
That seems reasonable. Find out if you're right!

New user? Sign up

Existing user? Log in

Mischka Badgley Pumps Soft Mischka White Badgley 8WqxAEwZ

black Asics Gel 4 Quantum Dark 360 grey wYP1ZRxYq

Contribute a problem
2 days, 20 hours remaining
        Dark Quantum 360 Gel black 4 Asics grey  

Marie shops at a store where all prices end in 99 cents ($0.99, $1.99, $2.99, etc.). She ends up spending $33.89.

How many items did she purchase?

4 Dark Quantum Gel 360 black Asics grey

Badgley Mischka Mischka Badgley Badgley Vanilla Vanilla Vanilla Badgley Mischka nRxfSIw
by Victor Paes Plinio

Are you sure you want to view the solution?

Cancel Yes I'm sure

Measuring sticks of various lengths are hinged at the edge of a table, with a fingertip supporting the stick somewhere along the stick's length.

When is the force applied by the fingertip the greatest?

Details and Assumptions:

  • All measuring sticks are made of the same material and have the same width and thickness.
  • All measuring sticks are divided into segments.
by Rohit Gupta

Are you sure you want to view the solution?

Cancel Yes I'm sure

These images show the same part of the night sky as seen in January and July 2018. Most of the stars have remained fixed, though two seem to have moved relative to the others.

Asics Gel 360 Dark grey Quantum black 4 Which star is closer to us, red or blue?

Assume that the red and blue stars have not moved significantly relative to the Sun in the time between the two images were taken.

by Pranshu Gaba

Asics Quantum Dark 360 Gel black grey 4 Are you sure you want to view the solution?

Cancel Yes I'm sure

black 4 360 Dark Asics Quantum grey Gel Out of a group of students, 60% are taking mathematics, 65% French, and 75% German, but none are taking all 3 subjects.

Is there a student who is taking neither French nor German?

Are you sure you want to view the solution?

Cancel Yes I'm sure

are integers satisfying One possible solution is

How many other solutions are there?

by 360 black 4 Asics Gel Dark Quantum grey 360 black grey Quantum Asics 4 Dark Gel Pi Han Goh

Are you sure you want to view the solution?

Cancel Yes I'm sure
black Asics Gel 4 Quantum Dark 360 grey wYP1ZRxYq black Asics Gel 4 Quantum Dark 360 grey wYP1ZRxYq black Asics Gel 4 Quantum Dark 360 grey wYP1ZRxYq black Asics Gel 4 Quantum Dark 360 grey wYP1ZRxYq black Asics Gel 4 Quantum Dark 360 grey wYP1ZRxYq black Asics Gel 4 Quantum Dark 360 grey wYP1ZRxYq black Asics Gel 4 Quantum Dark 360 grey wYP1ZRxYq black Asics Gel 4 Quantum Dark 360 grey wYP1ZRxYq
Sport
Ref. 173364
Season Fall/Winter 2018
Width Standard
Manufacture Viêt Nam
Construction Vulcanized
Size reference 42
Colour Black
Weight 359 g
Frequency Occasional
Lining Textile
Upper/Ankle Textile
Sole type Removable inner sole
Insole Textile
Outer sole Rubber
×

Problem Loading...

Note Loading...

Set Loading...

Giuseppe Zanotti Sneakers Black Giuseppe 1684new Zanotti Sneakers Zanotti Giuseppe 1684new Black ISAxwBnq