Number and QuantityPro Problems > Math > Number and Quantity
Featured Pro Problems
Without a calculator find a nine digit number that meets the criteria of the problem
A math problem involving Shrek wanting Fiona's telephone number
Multiply a three by one matrix and a one by three matrix
Strings of red lights and green lights on my Christmas tree - a Christmas word problem
Solve for x in this matrix multiplication equation
Find the value of w in the matrix multiplication problem
A diophantine equation - quadratic in two variables
Use divisibility rules to determine the number with missing digits
Full Directory ListingThe Value of a Word, Trick-or-Treat Math, Two Numbers
Understanding Coronavirus Spread
A Question and Answer session with Professor Puzzler about the math behind infection spread.
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