Math question: The average of five numbers is 130. If four of the numbers are 120, 125, 140, and 135, what is the fifth number?

To find the fifth number, we need to determine the sum of the five numbers and subtract the sum of the given four numbers from it. The sum of the four given numbers (120, 125, 140, and 135) is 520 (120+125+140+135 = 520). Since the average of the five numbers is 130, the sum of all five numbers is 130 multiplied by 5, which is 650 (130 * 5 = 650). To find the fifth number, we subtract the sum of the given four numbers, 520, from the sum of all five numbers, 650. Thus, the fifth number is 650 - 520 = 130. Therefore, the fifth number is 130.

Question: A squirrel is collecting acorns and has already collected 130 acorns. If the squirrel collects an additional 20 acorns each day, how many acorns will it have collected after 15 days?

To find the number of acorns the squirrel will have after 15 days, we need to multiply the number of days by the additional acorns collected per day and then add it to the starting number. Additional acorns collected per day = 20 Number of days = 15 Starting number of acorns = 130 Hence, the total acorns collected after 15 days will be: Total acorns = (Additional acorns per day × Number of days) + Starting number of acorns Total acorns = (20 × 15) + 130 Total acorns = 300 + 130 Total acorns = 430 Therefore, the squirrel will have collected 430 acorns after 15 days.

What is the least positive integer that, when multiplied by 130, becomes a perfect square?

To find the least positive integer that, when multiplied by 130, results in a perfect square, we need to determine the prime factorization of 130, which is 2 * 5 * 13. For a number to be a perfect square, its prime factorization should only include even powers of primes. In this case, the prime factorization of 130 has one odd power of 13. So, to make it a perfect square, we need to multiply it by an additional factor of 13, giving us 130 * 13 = 1690. Therefore, the least positive integer that, when multiplied by 130, becomes a perfect square is 1690.

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

130 (number)

130 is an even 3-digits composite number following 129 and preceding 131. In scientific notation, it is written as 1.30 × 10^2. The sum of its digits is 4. It has a total of 3 prime factors and 8 positive divisors. There are 48 positive integers (up to 130) that are relatively prime to 130.

Interesting facts

130 has 8 divisors, whose sum is 252
The reverse of 130 is 031
Previous prime number is 13

Basic properties

Is Prime? no
Number parity even
Number length 3
Sum of Digits 4
Digital Root 4

Name

Name	one hundred thirty

Notation

Scientific notation	1.30 × 10^2
Engineering notation	1.30 × 10^0

Prime Factorization of 130

Prime Factorization 2 × 13 × 5

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	130	Product of the distinct prime numbers

The prime factorization of 130 is 2 × 13 × 5. Since it has a total of 3 prime factors.

Most popular turbo-numbers

2, 4, 64, 33, 803, 58, 3264, 6154, 71415, 81566, 506748, 664597, 8107934, 81868, 50550872, 80894068, 427397632, 346654292, 2491046041, 1871781840

Basic calculations (n = 130)

Multiplication

n×y

n×2	260
n×3	390
n×4	520
n×5	650

Division

n÷y

n÷2	65
n÷3	43.333333333333
n÷3	32.5
n÷5	26

Exponentiation

n^y

n²	16900
n³	2197000
n⁴	285610000
n⁵	37129300000

Nth Root

^y√n

²√n	11.401754250991
³√n	5.0657970191009
⁴√n	3.3766483753852
⁵√n	2.6472116807054

Divisors of 130

1, 2, 5, 10, 13, 26, 65, 130

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-129	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	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	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 130 can be divided by 8 positive divisors. The sum of these divisors (counting 130) is 1, the average is 0.125.

Base conversion 130

Base	System	Value
2	Binary	10000010
3	Ternary	11211
4	Quaternary	2002
5	Quinary	1010
6	Senary	334
8	Octal	202
10	Decimal	130
12	Duodecimal	aa
16	Hexadecimal	82
20	Vigesimal	6a
36	Base36	3m

Cryptographic Hash Functions

md5	9b8619251a19057cff70779273e95aa6
sha1	2a7541babb57434e5631ffa2b5639e24f8ce84fc
sha256	38d66d9692ac590000a91b03a88da1c88d51fab2b78f63171f553ecc551a0c6f
sha512	f82074dd637c0b64b91d14d85f0b67faaa60a49686677f2b8851fdbd81d9aed2d8b347e5cf2c77b53063900cc805755e3a14f7c405be2544fb4e35368d463425
ripemd-160	ea4bc2d95af545851a5d919670b621a9c5a1c36a

130 as geometric shapes

Circle

Radius = n

Diameter	260
Circumference	816.81408993335
Area	53092.915845668

Sphere

Radius = n

Volume	9202772.0799157
Surface area	212371.66338267
Circumference	816.81408993335

Square

Length = n

Perimeter	520
Area	16900
Diagonal	183.8477631085

Cube

Length = n

Surface area	101400
Volume	2197000
Space diagonal	225.16660498395

Equilateral Triangle

Length = n

Perimeter	390
Area	7317.9146619785
Altitude	112.58330249198

Triangular Pyramid

Length = n

Surface area	7317.9146619785
Volume	258918.93304447
Height	61.282587702834