General Mathematical Aptitude B

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1)	N = 1a9b7c is a six-digit number where A = 1a9 and B = b7c are three-digit perfect squares of two digit numbers. If squareroot(B) = 2 * squareroot(A), which of the following statements is true?
	A) a equal to b equal to c B) b equal to c not equal to a C) N = 169676 is one of the two possible values. D) A + B = 5A
2)	N = abcde is a five digit even number where a, b, c, d and e are five concective digits. M = baecd is also a five-digit number. If N + M is also a five-digit number, find the value of M - N.

3)	When the reverse of a two-digit number is added to it, we get a perfect square. Find the difference between the two digits of the original number.

4)	To find a four-digit number (abcd) which of the following statements is/are necessary/sufficient?
	A) a + c = b + d = 8 B) N is divisble by 5. C) a + b not equal to c + d

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