澳大利亚数学竞赛AMC-7-8年级AMCJunior2011.docx

AU S T R A L i A N MAT h E M AT i C S CO M P E T i T i O N A N A C t i V i t Y O F t H E A U S t R A L i A N M A t H E M A t i C S t R U S t ThURSD AY 4 A UGUST 2 011 JUNIOR JUNIOR DIVISION COMPETITION PAPER A USTRALiAN S ChOOL Y EARS 7 AND 8 TiME ALLOWED: 75 MiNUTES GENERAL INSTRUCTIONS AND INFORMATION Do not open the booklet until told to do so by your teacher. NO calculators, slide rules, log tables, maths stencils, mobile phones or other calculating aids are permitted. Scribbling paper, graph paper, ruler and compasses are permitted, but are not essential. Diagrams are NOT drawn to scale. They are intended only as aids. There are 25 multiple-choice questions, each with 5 possible answers given and 5 questions that require a whole number answer between 0 and 999. The questions generally get harder as you work through the paper. There is no penalty for an incorrect response. This is a competition not a test; do not expect to answer all questions. You are only competing against your own year in your own State or Region so different years doing the same paper are not compared. Read the instructions on the answer sheet carefully. Ensure your name, school name and school year are entered. It is your responsibility to correctly code your answer sheet. When your teacher gives the signal, begin working on the problems. THE ANSWER SHEET Use only lead pencil. Record your answers on the reverse of the answer sheet (not on the question paper) by FULLY colouring the circle matching your answer. Your answer sheet will be scanned. The optical scanner will attempt to read all markings even if they are in the wrong places, so please be careful not to doodle or write anything extra on the answer sheet. If you want to change an answer or remove any marks, use a plastic eraser and be sure to remove all marks and smudges. INTEGRITY OF THE COMPETITION The AMT reserves the right to re-examine students before deciding whether to grant official status to their score. ?A