Number Properties Flashcards

1
Q

Que se necesita para que un número sea primo

A

Divisible por exactamente 2 números

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2
Q

Que números se pueden dividir por exactamente 3 divisores

A

Los cuadrados de números primos

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3
Q

11 al cuadrado

A

121

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4
Q

12 al cuadrado

A

144

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5
Q

13 al cuadrado

A

169

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6
Q

14 al cuadrado

A

196

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7
Q

15 al cuadrado

A

225

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8
Q

Que tipo de número es 0

A

Even
Integer

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9
Q

Even + odd

A

Odd

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10
Q

Even + even

A

Even

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11
Q

Odd + odd

A

Even

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12
Q

Odd times even

A

Even

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13
Q

Odd times odd

A

Odd

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14
Q

Even times even

A

Even

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15
Q
A

Black

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16
Q

3 a la 1
3 a la 2
3 a la 3
3 a la 4

A

3
9
27
81

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17
Q

4 a la 1
4 a la 2
4 a la 3
4 a la 4

A

4
16
64
256

18
Q

5 a la 1
5 a la 2
5 a la 3
5 a la 4

A

5
25
125
625

19
Q

Mississippi rule

A

Número total de espacios/(A!)(b!)…

Donde a y b son el único tipo de letras y la cantidad de veces que se repiten

20
Q

Propiedades GCF y LCM

A

XY = GCF(x,y) * LCM(x,y)

21
Q

What is the reciprocal of 11

A

1/11

22
Q

Formula for reciprocal

A

Reciprocal (1/n) = n

23
Q

Name digit types from
1234.567

A
24
Q

How to know if a number i divisible by 4

A

if the last two digits divisible by 4

25
Q

Cómo saber el dígito final de un número con un exponente grande

A

Luego de encontrar el patrón, divide el exponente entre el número de periodos y el reminder permitirá contar el restante del ciclo

26
Q

Cómo saber si una fracción es un terminating decimal

A

Si al simplificarla al Máximo. El denominador está compuesto únicamente por factores 2 y/o 5

27
Q

Perfect square other than 0 and 1 have what in Comon

A

All of its prime factors have even exponents
Ej: 144 = 2^4 x 3^2

28
Q

Raíz de 2

A

1.4

29
Q

Raíz de 3

A

1.7

30
Q

Raíz de 5

A

2.2

31
Q

Cómo sacar el LCM de (x,y)

A

XY/GCM(X,Y)

32
Q

Cómo sacar LCM de más de 2 números

A

Saco el prime factorization de todos los factores.

Me quedo con los factores y el exponente más grande que tengan entre los números

33
Q

How do you express an odd number and an even number

A

Even = 2K
Odd = 2K+1

34
Q

Los primos son únicamente números positivos?

A

Si

35
Q

Cómo sacar la suma de los factores de un integer

A
  1. Hacer prime factorization
  2. Luego utilizar fórmula
36
Q

Cómo encontrar los trailing zeroes de un número muy grande ejemplo 60!

A
37
Q

Cómo sacas el promedio de un evenly spaced set

A

Median=Mean=(a1+an)/2

38
Q

Raíz de 5

A

2.2

39
Q

What does x% mean

A

X/100

40
Q

Is (x)(x+1)(x+2) a multiple of 3?

A

Yes

41
Q

Is (x)+(x+1)+(x+2) divisible by 3?

A

Yes