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1.B; 2.B
1. (i) X can be a fraction or -ve no =>> Insuff
(ii) 0 < x < 1 =>> x is a fraction. Hence, Suff
2. N.B: every integer is a divisor of itself, and every integer is a divisor of 0, except by convention 0. If a/b = c, => a = dividend, b = divisor & c = quotient.
(i) None of 0, 2, 3, 4, 5 and 7 is a multiple of the missing digit =>> 6, 8, 9 Hence, Insuff
(ii) 25 + x = N^2 => If N=5, x=0; If N=6, x=11 [wrong, b'cos X = single digit]
=> x can only be 0. Suff. Hence, B.
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