## Search found 7 matches

Sun Jun 28, 2020 10:33 pm
Topic: BdMO-2019/4 secondary
Replies: 0
Views: 109

### BdMO-2019/4 secondary

In this figure ABCD is a trapezium where \$AB||CD\$. \$P, Q,R, S\$ are the midpoint of \$AB,BD,DC,CA\$ respectively. \$AC\$ and \$BD\$ intersect at point \$O\$. Area of \$\triangle AOB = 2019\$ and area of \$\triangle COD = 2020\$ .What is the area of quadrilateral \$PQRS\$?
Sat Dec 22, 2018 8:55 pm
Forum: Geometry
Topic: Centroid Division theorem
Replies: 0
Views: 7665

### Centroid Division theorem

Hey! Can anyone please tell me How to prove Centroid Division theorem by using negative homothety?
Wed Jan 03, 2018 9:04 pm
Forum: Number Theory
Topic: Divisibility
Replies: 1
Views: 3331

### Divisibility

Prove that any integer of the form ( 4k + 3 ) has a prime factor of the same form .
Fri Dec 15, 2017 9:36 pm
Forum: Number Theory
Topic: Divisibility
Replies: 1
Views: 3256

### Divisibility

Find n such that 2n31024 − 1.
Thu Dec 14, 2017 7:09 pm
Forum: Number Theory
Topic: GCD
Replies: 1
Views: 3194

### GCD

gcd(a,0) = ?
Thu Dec 14, 2017 7:05 pm
Topic: BDMO REGIONAL 2017
Replies: 3
Views: 5265

### BDMO REGIONAL 2017

In a diagram, two surfaces are partially superimposed in each other. The perimeter of one surface is 201 units and the area is 201 square units. The perimeter of the other surface is 710 units and the area is 710 square units. What is the difference of the area of the two surfaces that is not black ...
Thu Dec 14, 2017 6:31 pm
Forum: Number Theory
Topic: NUMBER THEORY
Replies: 1
Views: 3537