Question

find the sum of first 25 multiples of 6?​

Answer 1

Answer:

its 150

Step-by-step explanation:

25 x 1 is 25 25x2 is 50 25x3 is 75 25x4 is 100 25x5 is 125 25x6 is 150

Answer 2

The sum of first 25 multiples of 6 is 420

Explanation: A multiple, in maths is created by multiplying any number by an integer. In other words, if b = na for some integer n, known as the multiplier, it can be said that b is a multiple of a given two numbers, a and b. This is equivalent to stating that b/a is an integer if an is not zero.

The first 25 multiples of 6 are 6, 12, 18.., 120

It is a series with $a=6,\ d=6,\ n=20$

For Sum $S_n$

$\Rightarrow S_n=\frac{n}{2}[2a+(n-1)d]\\\Rightarrow S_n=\frac{20}{2}[2\times 6+(6-1)6]\\\Rightarrow S_n=10(12+30)\\\Rightarrow S_n=10\times 42=420$

$\therefore$ the sum of the first 25 multiples of 6 is 420

To learn about solving, more questions involving multiples, click on the links below:

https://brainly.in/question/4319382?msp_srt_exp=5

https://brainly.in/question/4616822?msp_srt_exp=5

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