Math question: If John has 20 apples and eats 3 apples each day, how many days will it take for him to eat all the apples?

To find the number of days John will take to eat all the apples, we can divide the total number of apples (20) by the number of apples he eats per day (3). The division can be written as: 20 ÷ 3 = 6.666... Since John cannot eat a fraction of an apple, we need to round up to the nearest whole number. Therefore, it will take him 7 days to eat all the apples. In these 7 days, he will have consumed a total of 3 apples each day, resulting in 3 x 7 = 21 apples eaten. As a result, he will have finished all the 20 apples and will have eaten one extra from a new day.

Question: If I divide a number by 5, add 3 to the quotient, and then multiply the result by 2, the final outcome is 40. What is the original number?

Let's say the original number is x. When dividing x by 5, we get x/5. Adding 3 to the quotient gives us (x/5) + 3. Multiplying this sum by 2 yields 2[(x/5) + 3] = 40. Simplifying, we have 2(x/5) + 6 = 40. Rearranging the equation, we get 2(x/5) = 40 - 6, or 2(x/5) = 34. Multiplying both sides by 5/2, we get x = 85. Therefore, the original number is 85.

Math question: What is the sum of all odd numbers between 1 and 20?

The sum can be found using the arithmetic series formula or by manually adding the odd numbers: 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 = 100.

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

20 (number)

20 is an even 2-digits composite number following 19 and preceding 21. In scientific notation, it is written as 2.0 × 10^1. The sum of its digits is 2. It has a total of 3 prime factors and 6 positive divisors. There are 8 positive integers (up to 20) that are relatively prime to 20.

Interesting facts

20 has 6 divisors, whose sum is 42
The reverse of 20 is 02
Previous prime number is 2

Basic properties

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

Name

Name	twenty

Notation

Scientific notation	2.0 × 10^1
Engineering notation	2.0 × 10^0

Prime Factorization of 20

Prime Factorization 2 × 2 × 5

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	10	Product of the distinct prime numbers

The prime factorization of 20 is 2 × 2 × 5. Since it has a total of 3 prime factors.

Most popular turbo-numbers

2, 6, 66, 35, 33, 232, 6626, 3143, 77271, 17890, 733513, 899052, 7589004, 5389650, 73432328, 77432639, 764461465, 696662184, 8899909109, 6693894854

Basic calculations (n = 20)

Multiplication

n×y

n×2	40
n×3	60
n×4	80
n×5	100

Division

n÷y

n÷2	10
n÷3	6.6666666666667
n÷3	5
n÷5	4

Exponentiation

n^y

n²	400
n³	8000
n⁴	160000
n⁵	3200000

Nth Root

^y√n

²√n	4.4721359549996
³√n	2.7144176165949
⁴√n	2.1147425268811
⁵√n	1.8205642030261

Divisors of 20

1, 2, 4, 5, 10, 20

6 divisors

τ	Total Divisors	6	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-19	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.16666666666667	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	6	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20 can be divided by 6 positive divisors. The sum of these divisors (counting 20) is 1, the average is 0.16666666666667.

Base conversion 20

Base	System	Value
2	Binary	10100
3	Ternary	202
4	Quaternary	110
5	Quinary	40
6	Senary	32
8	Octal	24
10	Decimal	20
12	Duodecimal	18
16	Hexadecimal	14
20	Vigesimal	10
36	Base36	k

Cryptographic Hash Functions

md5	98f13708210194c475687be6106a3b84
sha1	91032ad7bbcb6cf72875e8e8207dcfba80173f7c
sha256	f5ca38f748a1d6eaf726b8a42fb575c3c71f1864a8143301782de13da2d9202b
sha512	dfa5d1cefd0efdf5f52b765120da72c5706eb1dd113234cfdf31e31f9cd0283366f6a8f7230f29ea42d83acfe02743dc2504cda07c30f6e84bf9b1ca35966266
ripemd-160	43f45a58e89c88613e80be4953067b311be0b8aa

20 as geometric shapes

Circle

Radius = n

Diameter	40
Circumference	125.66370614359
Area	1256.6370614359

Sphere

Radius = n

Volume	33510.321638291
Surface area	5026.5482457437
Circumference	125.66370614359

Square

Length = n

Perimeter	80
Area	400
Diagonal	28.284271247462

Cube

Length = n

Surface area	2400
Volume	8000
Space diagonal	34.641016151378

Equilateral Triangle

Length = n

Perimeter	60
Area	173.20508075689
Altitude	17.320508075689

Triangular Pyramid

Length = n

Surface area	173.20508075689
Volume	942.80904158206
Height	9.4280904158206