Question

a)Integer 'n' for which 28 +2^11 + 2^n is a perfect square
b)Smallest positive integer 'n' for which (2^2 - 1)(3^2 -1)(4^2 - 1)
... (n^2 – 1) is a perfect square
c)Sum of digits, of 2 digit number less than 30 which secedes the product of its digit by 12
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Answer 1

Answer:

which 28 +2^11 + 2^n is a perfect square

b)Smallest positive integer 'n' for which (2^2 - 1)(3^2 -1)(4^2 - 1)

... (n^2 – 1) is a perfect square

c)Sum of digits, of 2 digit number less than 30 which secedes the product of its digit by 12