Grade 6-1
45 problems
Compute with newly defined operations
Simplify complex fractions
Simplify messy fraction-decimal expressions
Batting average and win rate
Work rates add, times do not
Newton's cows: grass grows while eaten
Volume of a composite solid
Volume of prisms and pyramids
Water height from base area
Counting painted unit cubes
Largest and smallest surface area
Surface area of a composite solid
Complete a syllogism from two premises
Deduction table decides a one-to-one matching
Fewest groups with no conflicting pair
Case-split on a hypothetical condition
Fewest river crossings under rules
Seat people from adjacency clues
Recover an answer key from scores
Exactly one statement is true
Truth-tellers and liars
Angle between the hands at a given time
When the hour and minute hands overlap
Read the time on a numberless clock
Complete a partial net of a prism or pyramid
Count vertices, faces, edges of prisms and pyramids
Euler's formula for polyhedra
Edges of a solid from its net
Different ways to finish a net
Shortest string tied around a box
Faces, edges, vertices and Euler's formula
Vertex labels on a regular octahedron net
Defining regular polyhedra and why only five
Dual polyhedron from face centers
Semiregular solids by cutting off vertices
Descartes' angle-defect theorem
Catching up: subtract the two speeds
Compare speeds by a common unit rate
Meeting head-on: add the two speeds
Boat speed with and against a current
Round trip at two different speeds
Train passing completely through a tunnel
Percent change in a price
Recover the whole from a percent
Concentration of a salt solution