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Hi All, I just started with my GMAT preparation and came across the 1st question in Number Properties (Guide One) on page 21. The question says "If a is divided by 7 or by 18, an integer results. Is a/42 an integer?" I solved this question and realized that the answer will be NO. Because t...

Let the sides be a, a and h. Where a are the equal sides of iso triangle and h is hypotenuse a^2 + a^2 = h^2 ---> Pytho theorem => 2(a^2) = h^2 => a^2 = (h^2)/2 => a = sq rt (h^2) / sq rt 2 = h / sq rt 2 Perimeter = sum of 3 sides = a + a + h = 16 + 16(sq rt 2) which is given in quest an...