Observe the following pattern for obtaining the sums, then find the sum of numbers from 781 to 790?
$1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55$
$11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20 = 155$
$21 + 22 + 23 + 24 + 25 + 26 + 27 + 28 + 29 + 30 = 255$
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$101 + 102 + 103 + 104 + 105 + 106 + 107 + 108 + 109 + 110 = 1055$
$251 + 252 + 253 + 254 + 255 + 256 + 257 + 258 + 259 + 260 = 2555$

7055

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7855

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7955

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8155

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Solution

The correct option is B $7855$
$781 + 782 + 783 + 784 + 785 + 786 + 787 + 788 + 789 + 790 = 7855$

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Similar questions

Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data:

28	17	15	22	29	21	23	27	18	12	7	2	9	4
1	8	3	10	5	20	16	12	8	4	33	27	21	15
3	36	27	18	9	2	4	6	32	31	29	18	14	13
15	11	9	7	1	5	37	32	28	26	24	20	19	25
19	20	6	9

Q. In a survey, it was found that 64 families bought milk in the following quantities in a particular month. Prepare a frequency distribution with classes as 5−9, 10−14 etc.

19	16	22	9	22	12	39	19	6	24	16	18	7	17	20	25
10	24	20	21	10	7	18	28	14	23	25	34	22	14	33	23
13	36	11	26	11	37	30	13	22	21	32	21	31	17	16	23
15	27	17	21	23	14	24	8	9	15	29	20	18	28	26	12

Q. Taking 4 as the magnitude of the class intervals, form a grouped frequency distribution using the following data by inclusive method.

31, 23, 19, 29, 22, 20, 16, 10, 13, 34
38, 33, 28, 21, 15, 18, 36, 24, 18, 15
12, 30, 27, 23, 20, 17, 14, 32, 26, 25
18, 29, 24, 19, 16, 11, 22, 15, 17, 10

Mr.Nitin's class went to the museum on the fourth Tuesday in November 20XX .On what date did his class go to the museum ?

Consider this calendar. Select the numbers 4,5,6,11,12,13,18,19,20 such that they form a square. The sum of the selected numbers of the square, is ____ times the middle number of the square.

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28	17	15	22	29	21	23	27	18	12	7	2	9	4
1	8	3	10	5	20	16	12	8	4	33	27	21	15
3	36	27	18	9	2	4	6	32	31	29	18	14	13
15	11	9	7	1	5	37	32	28	26	24	20	19	25
19	20	6	9

19	16	22	9	22	12	39	19	6	24	16	18	7	17	20	25
10	24	20	21	10	7	18	28	14	23	25	34	22	14	33	23
13	36	11	26	11	37	30	13	22	21	32	21	31	17	16	23
15	27	17	21	23	14	24	8	9	15	29	20	18	28	26	12

November 20XX
Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
	1	2	3	4	5	6
7	8	9	1	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30

28	17	15	22	29	21	23	27	18	12	7	2	9	4
1	8	3	10	5	20	16	12	8	4	33	27	21	15
3	36	27	18	9	2	4	6	32	31	29	18	14	13
15	11	9	7	1	5	37	32	28	26	24	20	19	25
19	20	6	9

19	16	22	9	22	12	39	19	6	24	16	18	7	17	20	25
10	24	20	21	10	7	18	28	14	23	25	34	22	14	33	23
13	36	11	26	11	37	30	13	22	21	32	21	31	17	16	23
15	27	17	21	23	14	24	8	9	15	29	20	18	28	26	12

The correct option is B 7855781+782+783+784+785+786+787+788+789+790=7855

The correct option is B $7855$
$781 + 782 + 783 + 784 + 785 + 786 + 787 + 788 + 789 + 790 = 7855$

28	17	15	22	29	21	23	27	18	12	7	2	9	4
1	8	3	10	5	20	16	12	8	4	33	27	21	15
3	36	27	18	9	2	4	6	32	31	29	18	14	13
15	11	9	7	1	5	37	32	28	26	24	20	19	25
19	20	6	9

19	16	22	9	22	12	39	19	6	24	16	18	7	17	20	25
10	24	20	21	10	7	18	28	14	23	25	34	22	14	33	23
13	36	11	26	11	37	30	13	22	21	32	21	31	17	16	23
15	27	17	21	23	14	24	8	9	15	29	20	18	28	26	12