Question

Find the sum of first 15 even natural numbers

Answer 1

Answer:

210

Step-by-step explanation:

0+2+4+6+8+10+12+14+16+18+20+22+24+26+28

= 210

Answer 2

Answer:

Natural Numbers is 120

Step-by-step explanation:

• In mathematics, the natural numbers are considered to be a part of the number system.
• It includes from the positive number of 1 to the infinity. They are called as counting numbers due to the reason for not having to include zero or any negative number.

• Examples of natural numbers can be 23, 56, 999, and so on.

• The natural numbers can be classified into 3 types of forms . They are:

1) Statement form:

They begin from N = set of all numbers starting from 1.

2) Roaster form:

They begin from N ={ 1,2,3,4,5,6,7,8,9…..}.

3) Set Builder form:

They begin from N ={x:x is an integers starting from 1}.

Given that:

To find the first 15 natural numbers.

Let us assume the first natural numbers as

N = {1,2,3,4,5,6,7,8,9,10,11,12, 13, 14, 15}

Now, by applying the formula of natural numbers:

N(n+2) /2

Here, N is 15

15(15+2) /2

15(16)/2

15*8

= 120

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