Martha writes three two-digit integers: one cube, one prime, and one divisible by 15. The digits 3,4,5,6,7,8 are each used exactly once. Which prime does she write?
Penelope folds the square three times along the dotted lines, then cuts along the red line as shown. On opening the folded strip, she obtains a letter. Which letter?
In each round of a two-player game, the winner gets 2 points and the loser 1; there are no draws. Jack wins exactly 5 rounds and Jill finishes with 11 points. How many rounds are played?
Webster Middle School students raise money for after-school programmes. In which month do the two grades raise the most money in total? Chart legend: blue=8th graders, red=9th graders; vertical axis is dollars raised.
A slide is built from an inclined plane and identical cubes of side 30 cm. All top surfaces shown in white, including the ramp and horizontal stair treads, are painted. Find the painted area in m².
Two square sheets each have area 100 cm². They are arranged in the two patterns shown. The difference between the occupied areas is 60 cm². Find the difference between their outer perimeters. Overlaps count only once.
Greg starts with 10 points. Each correct answer doubles his score, a skipped question adds 2, and a wrong answer adds 1. He ends with 999 points. What is the least possible number of questions? The source rule labels mean Correct, No answer, Wrong.