Do the numbers 12, 52, 72, 73 ….. form an A.P. ? If yes, its next term will be :
Yes, 112
No
Yes, 97
Yes, 24
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Given,
List = 12, 52, 72, 73 …..
= 1, 25, 49, 73, ……..
Here,
a2 - a1 = 25 - 1 = 24
a3 - a2 = 49 - 25 = 24.
Since, common difference between consecutive terms are equal.
Hence, it forms an A.P.
Next term = 73 + d = 73 + 24 = 97.
Hence, Option 3 is the correct option.
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2k - 7, k + 5 and 3k + 2 are in A.P.; the value of k is :
-9
6
-7
5
In an A.P. a = -36, d = 18 and l = 36, then n is :
10
15
20
The sum of first 10 even natural numbers is :
120
110
65