Math question: What is the sum of the numbers from 1 to 26, excluding multiples of 3?

To find the sum, we can use the formula for the sum of an arithmetic sequence, which is given by: Sn = (n/2)(a1 + an), where Sn is the sum, n is the number of terms, a1 is the first term, and an is the last term. First, let's find the number of terms: The sequence of numbers excluding multiples of 3 starts from 1 and goes up to 26. The multiples of 3 from 1 to 26 are 3, 6, 9, ... 24. Since 24 is the largest multiple of 3 less than 26, we can see that there are 8 multiples of 3 within the range. Hence, there are 26 - 8 = 18 non-multiples of 3 in the sequence. Next, we find the sum of the first and last terms: a1 = 1 and an = 26. Using the formula, Sn = (n/2)(a1 + an), we substitute the values: Sn = (18/2)(1 + 26) = 9(27) = 243. Therefore, the sum of the numbers from 1 to 26, excluding multiples of 3, is 243.

Math question: What is the sum of the digits of the number 26?

The sum of the digits of 26 is calculated by adding the digit 2 to the digit 6, resulting in 8. This can be expressed as 2 + 6 = 8.

Question: If 4 times a number plus 6 gives us 26, what is the number?

Let's assume the number is represented by x. According to the given information, we can set up the equation: 4x + 6 = 26. Now, let's solve for x. Subtracting 6 from both sides of the equation, we have 4x = 20. To find the value of x, we divide both sides by 4: x = 5. Therefore, the number is 5.

Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

26 (number)

26 is an even 2-digits composite number following 25 and preceding 27. In scientific notation, it is written as 2.6 × 10^1. The sum of its digits is 8. It has a total of 2 prime factors and 4 positive divisors. There are 12 positive integers (up to 26) that are relatively prime to 26.

Interesting facts

26 has 4 divisors, whose sum is 42
The reverse of 26 is 62
Previous prime number is 2

Basic properties

Is Prime? no
Number parity even
Number length 2
Sum of Digits 8
Digital Root 8

Name

Name	twenty-six

Notation

Scientific notation	2.6 × 10^1
Engineering notation	2.6 × 10^0

Prime Factorization of 26

Prime Factorization 2 × 13

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	26	Product of the distinct prime numbers

The prime factorization of 26 is 2 × 13. Since it has a total of 2 prime factors.

Most popular turbo-numbers

9, 4, 41, 34, 234, 921, 6380, 7580, 58718, 5093, 608239, 99843, 1791775, 7592895, 8869083, 45116884, 136440821, 362266872, 1159637776, 8147747496

Basic calculations (n = 26)

Multiplication

n×y

n×2	52
n×3	78
n×4	104
n×5	130

Division

n÷y

n÷2	13
n÷3	8.6666666666667
n÷3	6.5
n÷5	5.2

Exponentiation

n^y

n²	676
n³	17576
n⁴	456976
n⁵	11881376

Nth Root

^y√n

²√n	5.0990195135928
³√n	2.9624960684074
⁴√n	2.2581008643532
⁵√n	1.9186451916253

Divisors of 26

1, 2, 13, 26

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-25	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	1	Returns the nth root of the product of n divisors
H	Harmonic Mean	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 26 can be divided by 4 positive divisors. The sum of these divisors (counting 26) is 1, the average is 0.25.

Base conversion 26

Base	System	Value
2	Binary	11010
3	Ternary	222
4	Quaternary	122
5	Quinary	101
6	Senary	42
8	Octal	32
10	Decimal	26
12	Duodecimal	22
16	Hexadecimal	1a
20	Vigesimal	16
36	Base36	q

Cryptographic Hash Functions

md5	4e732ced3463d06de0ca9a15b6153677
sha1	887309d048beef83ad3eabf2a79a64a389ab1c9f
sha256	5f9c4ab08cac7457e9111a30e4664920607ea2c115a1433d7be98e97e64244ca
sha512	e053886e1b797bc5a80f932302f0201265a599d82e2502d41941d6e652614ef88fa058e009094d26655f880200df12c2100f690254fd1e5bae75d7441763cd33
ripemd-160	99c38df751bc17d581f71d1f9e39e8e387854d69

26 as geometric shapes

Circle

Radius = n

Diameter	52
Circumference	163.36281798667
Area	2123.7166338267

Sphere

Radius = n

Volume	73622.176639326
Surface area	8494.8665353068
Circumference	163.36281798667

Square

Length = n

Perimeter	104
Area	676
Diagonal	36.7695526217

Cube

Length = n

Surface area	4056
Volume	17576
Space diagonal	45.033320996791

Equilateral Triangle

Length = n

Perimeter	78
Area	292.71658647914
Altitude	22.516660498395

Triangular Pyramid

Length = n

Surface area	292.71658647914
Volume	2071.3514643558
Height	12.256517540567