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### NUMBER SERIES: Find the next term in the sequence. 3, 6, 15, 21, 27, __

NUMBER SERIES: Find the next term in the sequence. 3, 6, 15, 21, 27, __

NUMBER SERIES: Find the next term in the sequence. 3, 6, 15, 21, 27, __

### 15 (number) ^{[1]}

15 (fifteen) is the natural number following 14 and preceding 16.. – A composite number and the sixth semiprime; its proper divisors are 1, 3, and 5.

In hexadecimal, and higher bases, it is represented as F.. – A triangular number, a hexagonal number,[3] and a centered tetrahedral number.

– The magic constant of the unique order-3 normal magic square.. – 15’s prime factors, (3 and 5) also form its main factor pair (3 x 5) and both comprise the first twin-prime pair.

### Multiplication ^{[2]}

Multiplication is essentially repeated addition a given number is repeatedly added a number of times ; this can be notated or (or even ) and read ” times .”. In most computer programming languages, and in TeX source, the asterisk character * is used as the multiplication operator: m*n.

The multiplicative identity is 1: any number multiplied by 1 remains the same. For example, –43 × 1 = –43, 0 × 1 = 0, 3.7 × 1 = 3.7, etc.

Division is multiplication with multiplicative inverse of second term (the divisor) which by definition makes it non-commutative.. The generating function of sequences of multiples is

### Number Series – What Number Should Come Next? ^{[3]}

This is an example of division series; where each successive number is one-half of the previous number.. 4/2 = 2; 2/2 = 1; 1/2 = 1/2; (1/2)/2 = 1/4; (1/4)/2 = 1/8 and so on.

In the first pattern, 3 is added; in the second, 2 is subtracted and so on.. Number Series (Part 1) in Hindi – Basics and Methods, Examples, Math Tricks (Quantitative Aptitude made Simpler)

Explanation: Watch the Number Series (Part I) Video. Explanation: Watch the Number Series (Part I) Video

### Questions on Wrong Number in a Series ^{[4]}

Click on the option you think is right and then check by clicking on the Show Answer button. You can change your option as many times as you like.

The difference between the consecutive numbers increases progressively. The difference between 3 and 6 is 3, 6 and 10 is 4, 10 and 15 is 5, 15 and 21 is 6 and 21 and 28 is 7.

126 – 28 = 98; 98 – 70 = 28; 70 – 42 = 28; 42 – 14 = 28.. The series is made up of squares of all the odd numbers starting from 1.

### 1: Exercises, Practice, Solution ^{[5]}

Python Challenges – 1 [ 64 Challenges with solution]. [An editor is available at the bottom of the page to write and execute the scripts

Write a Python program to check if a given positive integer is a power of three.. Write a Python program to check if a given positive integer is a power of four.

Write a Python program to check if an integer is the power of another integer.. Write a Python program to check if a number is a power of a given base.

### Expert Maths Tutoring in the UK ^{[6]}

Let us look at an example, Sam asked Joy, “Do you know that there is a Chinese game of Go which is played on a grid of 19 x 19 lines?” He then asked Joy if he could recite the 19 times table. Joy and Sam together recited the multiplication table of 19 which consists of the multiplication of 19 with various whole numbers

Learning the multiplication table of 19 helps you in solving mathematical problems related to the two basic operations, i.e., multiplication and division. Go through the 19 times table that is given below and try to memorize it.

Here are some tips for you to memorize the 19 times table:. Let’s write the 1st 10 odd numbers in a sequence in the ten’s place

### Sources

- https://en.wikipedia.org/wiki/15_(number)#:~:text=15%20(fifteen)%20is%20the%20natural,following%2014%20and%20preceding%2016.
- https://oeis.org/wiki/Multiplication
- https://careerdost.in/aptitude-questions/number-series
- https://www.leadthecompetition.in/reasoning/questions-on-wrong-number-in-series.html
- https://www.w3resource.com/python-exercises/challenges/1/index.php
- https://www.cuemath.com/multiplication-tables/19-times-table/