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TGTET Paper 1 Exam 23 Jul 2017 Paper

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Question : 92 of 150
Marks: +1, -0
Number of Integers lie between (35)^{2 }and (36)^{2}
Solution:  
Concept:
The number of integers between two consecutive perfect squares n2n^2 and (n+1)2(n+1)^2 is 2n2n.
Explanation:
We are asked to find the number of integers that lie strictly between (35)2(35)^2 and (36)2(36)^2.
First, let's calculate the values of these squares:
(35)2=35×35=1225(35)^2 = 35 \times 35 = 1225
(36)2=36×36=1296(36)^2 = 36 \times 36 = 1296
We need to find the number of integers between 1225 and 1296. These integers are 1226, 1227, ..., 1295.
To find the count of these integers, we can use the formula: Number of integers = (Last integer) - (First integer) + 1.
In this case, the first integer is 1226 and the last integer is 1295.
Number of integers = 12951226+1=69+1=701295 - 1226 + 1 = 69 + 1 = 70.
Alternatively, using the general concept for consecutive squares: For squares n2n^2 and (n+1)2(n+1)^2, the number of integers between them is (n+1)2n21=n2+2n+1n21=2n(n+1)^2 - n^2 - 1 = n^2 + 2n + 1 - n^2 - 1 = 2n.
Here, n=35n = 35. So, the number of integers is 2×35=702 \times 35 = 70.
Answer:
70
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