Vietnam.vn - Nền tảng quảng bá Việt Nam

Two international triangle counting problems

VnExpressVnExpress25/05/2023


With two problems counting triangles in the international exam for 6th-7th graders, how long can you solve them?

Lesson 1 (Excerpt from APMOPS 2005 Math Olympiad exam):

Given 12 points on 2 lines (a),(b) as shown below. Ask how many triangles have 3 vertices taken from 3 of the 12 given points.

Two international triangle counting problems

Lesson 2 (Excerpt from BIMC 2013 Math Olympiad entrance exam):

Given 21 points on 3 lines (a),(b),(c) as shown below. Ask how many triangles with 3 vertices taken from 3 of the 21 given points are there at most.

Two international triangle counting problems - 1

See solution instructions

Challenge with similar problem

Tran Phuong



Source link

Comment (0)

No data
No data

Same tag

Same category

'Rich' flowers costing 1 million VND each are still popular on October 20th
Vietnamese Films and the Journey to the Oscars
Young people go to the Northwest to check in during the most beautiful rice season of the year
In the season of 'hunting' for reed grass in Binh Lieu

Same author

Heritage

Figure

Enterprise

Quang Ngai fishermen pocket millions of dong every day after hitting the jackpot with shrimp

News

Political System

Destination

Product