← Back to Quizzes Hints: 2/2 Brain Teaser Set – 5 Medium Start Your name (optional): Share Certificate Browse Quizzes Play Again [{"type":"single","prompt":"Next term: 10, 13, 18, 25, 34, ?","options":["41","43","45","47"],"answer":[2],"explanation":"Differences +3, +5, +7, +9 \u2192 next +11 = 45.","hint":"Odd-number gaps."},{"type":"single","prompt":"Which is different?","options":["Rectangle","Square","Rhombus","Circle"],"answer":[3],"explanation":"Circle has no straight sides; others are quadrilaterals.","hint":"Shape properties."},{"type":"single","prompt":"If AB = 3, BC = 5, CD = 7, then FG = ?","options":["11","12","13","14"],"answer":[2],"explanation":"Sum of letter positions \u2192 F(6)+G(7)=13.","hint":"A1Z26 addition."},{"type":"single","prompt":"Statement: All poets are artists. Some artists are singers.","options":["Only 1 follows","Only 2 follows","Both follow","Neither"],"answer":[0],"explanation":"Overlap is possible; universal claim in 2 is not implied.","hint":"\u201cMay be\u201d vs \u201cmust be\u201d."},{"type":"single","prompt":"Evaluate: 12 \u00f7 3 \u00d7 2 + 4 \u2212 5","options":["5","6","7","8"],"answer":[2],"explanation":"12\u00f73=4; 4\u00d72=8; 8+4=12; 12\u22125=7.","hint":"Left-to-right for \u00d7 and \u00f7."},{"type":"single","prompt":"If a @ b = a\u00b2 \u2212 b, find 9 @ 5.","options":["70","76","81","86"],"answer":[1],"explanation":"9\u00b2 \u2212 5 = 81 \u2212 5 = 76.","hint":"Apply the custom operator."},{"type":"single","prompt":"Ages: A is 6 years older than B, and B is twice C. If A + B + C = 66, find A.","options":["24","30","36","42"],"answer":[1],"explanation":"Let C=c \u21d2 B=2c, A=2c+6; sum = (2c+6)+2c+c=5c+6=66 \u21d2 c=12 \u21d2 A=30.","hint":"Form and solve equations."},{"type":"single","prompt":"Series: 2, 6, 15, 31, 56, ?","options":["80","86","92","98"],"answer":[2],"explanation":"Add squares: +4, +9, +16, +25 \u2192 next +36 = 92.","hint":"Consecutive squares."},{"type":"single","prompt":"A person walks 5 m East, 12 m North, then 5 m West. Position from start?","options":["12 m North","10 m North","5 m North","13 m North"],"answer":[0],"explanation":"East then equal West cancel; net = 12 m North.","hint":"Net displacement."},{"type":"single","prompt":"Marked price $200, discount 20%, tax 10% on SP. Final bill?","options":["$160","$176","$180","$200"],"answer":[1],"explanation":"SP after discount = 200\u00d70.80=160; add 10% tax \u2192 176.","hint":"Apply sequentially."}]
