# Mathcounts

##### Quoc Tran Anh Le Coodinator

04/08/2018 at 11:30##### Quoc Tran Anh Le Coodinator

04/08/2018 at 11:29-
3rd term is: 1 + 2 = 3

4th term is: 1 + 2 + 3 = 6

5th term is: 1 + 2 + 3 + 6 = 12

....

15th term is: 1 + 2 + 3 + 6 + 12 + 24 + 48 + 96 + 192 + 384 + 768 = 1536

Quoc Tran Anh Le selected this answer.

##### Quoc Tran Anh Le Coodinator

04/08/2018 at 11:29##### Quoc Tran Anh Le Coodinator

04/08/2018 at 11:29##### Quoc Tran Anh Le Coodinator

04/08/2018 at 11:28##### Quoc Tran Anh Le Coodinator

04/08/2018 at 11:27##### Quoc Tran Anh Le Coodinator

04/08/2018 at 11:27##### Quoc Tran Anh Le Coodinator

04/08/2018 at 11:26##### Quoc Tran Anh Le Coodinator

04/08/2018 at 11:26-
\(0.2\overline{36}=\dfrac{236-2}{990}=\dfrac{234}{990}=\dfrac{13}{55}\)

Selected by MathYouLike

##### Quoc Tran Anh Le Coodinator

29/07/2018 at 04:43## 4746

questions#### Weekly ranking

#### Tags

games 18
double counting 8
generating functions 2
probabilistic method 1
Polynomial 9
inequality 13
area 16
Equation 9
Primitive Roots Modulo Primes 1
Primitive in Arithmetic Progression 6
Base n Representatioons 4
Pell Equation 1
mixed number 1
Fraction 29
Circle 3
Imaginary numbers 1
Decimal number 2
Volume 2
percentages 6
simple equation 19
absolute value 19
rational numbers 20
Operation of Indices 21
Simulataneous Equation A System of Equations 25
Multiplication of Polynomial 17
divisibility 24
Maximum 5
Minimum 8
Fraction 4
Prime Numbers and Composite Numbers 13
Square Number 26
Even and Odd Numbers 13
GDC and LCM 11
GCD and LCM 12
Permutation and combination 9
combinations 5
interger 7
number 10
Diophantine equations 2
equations 1
Grade 6 19
Power 3
equality 2
maxima-minima 2
square root 1
Polygon 2
IGCSE 1
factorial 1
integers 2