Question

Find the sum of the integers between 1 and 200 which are multiples of 3 and 7​

Answer 1

Answer:

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Secondary School Math 5 points

Find the sum of integers between 1 and 200 which are multiples of 3 and 7

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Answers

dhanshreporl

dhanshreporl Expert

20100is your answer

I hope this helpzzzzzz.......

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vyshnavireddy

vyshnavireddy Genius

Multiples of 3 are 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 96, 99, 102, 105, 108, 111, 114, 117, 120, 123, 126, 129, 132, 135, 138, 141, 144, 147, 150, 153, 156, 159, 162, 165, 168, 171, 174, 177, 180, 183, 186, 189, 192, 195, 198,

multiples of 7 are 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98, 105, 112, 119, 126, 133, 140, 147, 154, 161, 168, 175, 182, 189, 196

multiples of both 3 and 7 are 21,42,63,84,105,126,147,168,189

then the sum of 21,42,63,84,105,126,147,168,189 is 947

Answer 2

Answer:

we use = n/2 [ a+l]

Step-by-step explanation:

first we find how many number divide by 3 and 7 , between 1 and 200

series = 21 , 42 , 63 ................, 196.

a+(n- 1) ×d = 200

21+21n- 21=200

= 21n =200

n = 9.5

but don't use number in pint so n= 10

n/ 2 [a+l]

= 10 /2 [ 21+196]

= 5× 217

=1,085

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