Printed positive marks are preserved per question. The source uses different blank-answer and incorrect-answer rules by section, including an optional bonus penalty; the import does not reproduce that complete official scoring scheme.
Chusri has 670 dollars: one 500-dollar note, one 100-dollar note, one 50-dollar note and one 20-dollar note. She buys a 13-dollar carton of milk using one note. Which amount cannot be her change?
Each student in a Grade 2 class chooses one favourite fruit. In the pictogram, orange has 3 symbols, banana 2, apple 4 and mango an unknown number. Each symbol represents 3 students. There are 36 students altogether. How many choose mango?
A primary school has 826 students. Grades 1, 3, 4, 5 and 6 have 139, 135, 136, 138 and 140 students respectively, as in the table. How many students are in Grade 2?