Math question: What is the sum of 7 consecutive odd numbers starting from 7?

To find the sum of consecutive odd numbers, we use the formula Sn = n/2(2a + (n-1)d), where Sn is the sum, n is the number of terms, a is the first term, and d is the common difference. In this case, n = 7 (since we have 7 numbers), a = 7, and d = 2 (because the numbers are consecutive odd numbers). Plugging these values into the formula, we get Sn = 7/2(2(7) + (7-1)2). Simplifying, Sn = 7/2(14 + 12) = 7/2(26) = 7/2(13) = 91. Therefore, the sum of 7 consecutive odd numbers starting from 7 is 91.

Math Question: What is the sum of twice the square of 7, minus the product of 7 and thrice its square root, divided by 7?

To find the result, we substitute the value of 7 into the given expression. First, square root of 7 is √(7) ≈ 2.646. Now we calculate: (2 * 7^2 - 7 * 3 * 2.646) / 7 = (2 * 49 - 7 * 3 * 2.646) / 7 = (98 - 49.854) / 7 = 48.146 / 7 ≈ 6.878 Therefore, the result obtained by substituting 7 into the expression is approximately 6.878.

Math question: What is the result of multiplying 7 by the sum of its multiples from 1 to 10?

To find the sum of multiples, we have 7, 14, 21, 28, 35, 42, 49, 56, 63, and 70. Adding these gives 385. Now, multiply this sum by 7: 385 × 7 = 2695. Thus, the result is 2695.

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

7 (number)

7 is an odd 1-digits prime number following 6 and preceding 8. In scientific notation, it is written as 7. The sum of its digits is 7. It has a total of 1 prime factors and 2 positive divisors. There are 6 positive integers (up to 7) that are relatively prime to 7.

Interesting facts

7 has 2 divisors, whose sum is 8
The reverse of 7 is 7
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 1
Sum of Digits 7
Digital Root 7

Name

Name	seven

Notation

Scientific notation	7
Engineering notation	7

Prime Factorization of 7

Prime Factorization 7

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	7	Product of the distinct prime numbers

The prime factorization of 7 is 7. Since it has a total of 1 prime factors.

Most popular turbo-numbers

9, 6, 8, 27, 162, 964, 9620, 1918, 65541, 93212, 361263, 462266, 5164586, 7028211, 56821017, 61223226, 63047163, 740246329, 3656748099, 5862761623

Basic calculations (n = 7)

Multiplication

n×y

n×2	14
n×3	21
n×4	28
n×5	35

Division

n÷y

n÷2	3.5
n÷3	2.3333333333333
n÷3	1.75
n÷5	1.4

Exponentiation

n^y

n²	49
n³	343
n⁴	2401
n⁵	16807

Nth Root

^y√n

²√n	2.6457513110646
³√n	1.9129311827724
⁴√n	1.6265765616978
⁵√n	1.4757731615946

Divisors of 7

1, 7

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	8	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	4	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	2.8284271247462	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.75	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 7 can be divided by 2 positive divisors. The sum of these divisors (counting 7) is 8, the average is 4.

Base conversion 7

Base	System	Value
2	Binary	111
3	Ternary	21
4	Quaternary	13
5	Quinary	12
6	Senary	11
8	Octal	7
10	Decimal	7
12	Duodecimal	7
16	Hexadecimal	7
20	Vigesimal	7
36	Base36	7

Cryptographic Hash Functions

md5	8f14e45fceea167a5a36dedd4bea2543
sha1	902ba3cda1883801594b6e1b452790cc53948fda
sha256	7902699be42c8a8e46fbbb4501726517e86b22c56a189f7625a6da49081b2451
sha512	f05210c5b4263f0ec4c3995bdab458d81d3953f354a9109520f159db1e8800bcd45b97c56dce90a1fc27ab03e0b8a9af8673747023c406299374116d6f966981
ripemd-160	a7ab75ae5e53dba6eea54b2f74a08bcb03991caa

7 as geometric shapes

Circle

Radius = n

Diameter	14
Circumference	43.982297150257
Area	153.9380400259

Sphere

Radius = n

Volume	1436.7550402417
Surface area	615.7521601036
Circumference	43.982297150257

Square

Length = n

Perimeter	28
Area	49
Diagonal	9.8994949366117

Cube

Length = n

Surface area	294
Volume	343
Space diagonal	12.124355652982

Equilateral Triangle

Length = n

Perimeter	21
Area	21.217622392719
Altitude	6.0621778264911

Triangular Pyramid

Length = n

Surface area	21.217622392719
Volume	40.422937657831
Height	3.2998316455372