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Answer: Each number is multiplied by 2: 5×2=10, 10×2=20, 20×2=40, 40×2=80.
Answer: A is B\'s brother, D is B\'s sister (so D is A\'s sister), C is D\'s father, so C is A\'s father. A is son of C.
Answer: Since some flowers are red and all flowers are beautiful, some beautiful things are red.
Answer: Each number is multiplied by 2: 2×2=4, 4×2=8, 8×2=16, 16×2=32.
Answer: Each number is multiplied by 2: 1×2=2, 2×2=4, 4×2=8, 8×2=16.
Answer: Perfect squares: 1²=1, 2²=4, 3²=9, 4²=16, 5²=25, 6²=36, 7²=49.
Answer: Since A + B = C and C + D = E, then A + B + D = C + D = E.
Answer: From \'some\' statements, we cannot definitively conclude any relationship between dogs and birds.
Answer: Since some cats are black and all black things are beautiful, some cats must be beautiful.
Answer: If all men are human and all human are mortal, then all men must be mortal.
Answer: Sum of alphabetical positions adjusted: M(13)+O(15)+O(15)+N(14)=57, coded as 44. S(19)+U(21)+N(14)=54, coded as 33.
Answer: We cannot definitively conclude any relationship between books and pens.
Answer: Each number increases by 3: 3, 6, 9, 12, 15.
Answer: Sum of alphabetical positions: C(3)+A(1)+T(20)=24, D(4)+O(15)+G(7)=26, M(13)+O(15)+U(21)+S(19)+E(5)=73, adjusted to 64.
Answer: We cannot definitively conclude that some roses are thorny or that all flowers are roses.
Answer: Adding the codes: 73541 + 82589662 = 15613763.
Answer: Perfect cubes: 1³=1, 2³=8, 3³=27, 4³=64, 5³=125.
Answer: C(3)+A(1)+T(20)=24.
Answer: If all boxes are triangles and all triangles are circles, then all boxes are circles, and some circles are boxes.
Answer: Mercury, Venus, Earth, and Mars are inner planets. Jupiter is an outer planet.