A garden has apple trees and orange trees. The number of apple trees is 5 times the number of orange trees. Which answer CANNOT be the total number of trees?
Six cards are numbered 0 to 5. Anna, Bella and Cindy each choose two cards to make a two-digit number, with no card shared. Anna’s number is a square; Bella’s is divisible by 6; Cindy’s is prime. Find Cindy’s number.
At a bookstore Lily spends half her money on mathematics books, then two thirds of the remaining money on literature books. What remains exactly buys an English book costing 18 dollars. How much did she have initially?
Ashley starts with a square sheet of side 7 dm. She cuts away two identical triangles and a square to make the letter C shown. Find the area of the letter.
An ant enters the number maze. It can move only from a smaller-valued cell to an adjacent greater-valued cell through a marked opening. Through which gate does it leave?
Lucy arranges 35 black and white cubes into the first figure, with the top view shown in the second. Vertically adjacent cubes must have different colours. How many cubes are black?
In summer Alice takes a bus from home to a daily mathematics lesson, then back home. The lesson runs from 08:30 to 10:30. Using the timetable, find her total time on the bus in one week.
The graph shows Clover’s distance from home. She visits a grocery store, then the park, returns to her grandparents’ house because of rain, cycles to a bookstore, and cycles home. Her average speed over the entire recorded time is 8 km/h. How long does she stay at her grandparents’ house?
Editorial convention: all travel follows one route, so a change in the plotted distance gives the distance travelled on that segment. The equal horizontal grid intervals represent equal times.
Seven dwarfs sit clockwise in the order Doc, Grumpy, Happy, Sneezy, Bashful, Sleepy, Dopey. Starting at a dwarf selected by Doc, they say consecutive integers from 1 clockwise. A dwarf saying a multiple of 6 leaves; counting continues with the next number at the next remaining dwarf. The last dwarf wins. Whom should Doc choose to start so that Doc wins?