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• Match the list : (Question no. 23 and 24)
(23)
Part-A
(1) Formula to obtain the sum of
first n positive inte

By Maya

• Match the list : (Question no. 23 and 24)
(23)
Part-A
(1) Formula to obtain the sum of
first n positive integers
Part-B
n(n+1)
(a) S.
2
n
(b) S
nin – 1)
2​

About the author
Maya

Which of the following can be four interior angles of a quadrilateral? *

140, 40, 20, 160

270, 150, 30, 20

9 x 2
–
– 2
6x
– 2 = 92 + 3x
31 Cзх+1) + 1С зxt
СЗ 71) (3xx)
1)​

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