← Back to Quizzes Hints: 2/2 Numbers Set -5 Medium Start Your name (optional): Share Certificate Browse Quizzes Play Again [{"type":"single","prompt":"144 \u00f7 6 \u00d7 3 + 8 = ?","options":["72","74","80","84"],"answer":[2],"explanation":"First 144 \u00f7 6 = 24, then 24 \u00d7 3 = 72, then 72 + 8 = 80.","hint":"Do division, then multiplication, then addition."},{"type":"single","prompt":"What comes next in the series: 7, 14, 28, 56, ?","options":["84","98","112","126"],"answer":[2],"explanation":"Each term is \u00d72 \u2192 7\u00d72=14, 14\u00d72=28, 28\u00d72=56, 56\u00d72=112.","hint":"Look for multiplication pattern."},{"type":"single","prompt":"25% of 360 \u2212 15% of 200 = ?","options":["40","50","60","70"],"answer":[2],"explanation":"25% of 360 = 0.25\u00d7360 = 90; 15% of 200 = 0.15\u00d7200 = 30; 90 \u2212 30 = 60.","hint":"Find each percentage separately, then subtract."},{"type":"single","prompt":"The average of 5 numbers is 24. Four of them are 18, 20, 25 and 27. What is the 5th number?","options":["28","30","32","34"],"answer":[1],"explanation":"Total of 5 numbers = 24\u00d75 = 120. Sum of four = 18+20+25+27 = 90. So 5th = 120 \u2212 90 = 30.","hint":"Average \u00d7 count = total sum."},{"type":"single","prompt":"In a class, the ratio of boys to girls is 3 : 2 and there are 35 students. How many boys are there?","options":["14","18","21","24"],"answer":[2],"explanation":"Total parts = 3+2 = 5. Each part = 35 \u00f7 5 = 7. Boys = 3\u00d77 = 21.","hint":"Convert ratio parts to actual numbers."},{"type":"single","prompt":"Find the simple interest on \u20b95000 at 8% per annum for 3 years.","options":["\u20b91000","\u20b91100","\u20b91200","\u20b91300"],"answer":[2],"explanation":"SI = (P\u00d7R\u00d7T)\/100 = (5000\u00d78\u00d73)\/100 = 5000\u00d70.24 = 1200.","hint":"Use the SI formula PRT\/100."},{"type":"single","prompt":"The LCM of 8, 12 and 18 is:","options":["36","48","60","72"],"answer":[3],"explanation":"8=2\u00b3, 12=2\u00b2\u00d73, 18=2\u00d73\u00b2. LCM = 2\u00b3\u00d73\u00b2 = 8\u00d79 = 72.","hint":"Take highest power of each prime factor."},{"type":"single","prompt":"A number is increased by 25% and becomes 180. What was the original number?","options":["135","140","144","150"],"answer":[2],"explanation":"Let number = x. x + 25% of x = 180 \u2192 1.25x = 180 \u2192 x = 180 \u00f7 1.25 = 144.","hint":"Write \u201cincreased by 25%\u201d as 1.25x."},{"type":"single","prompt":"An article is bought for \u20b9750 and sold for \u20b9900. What is the profit percentage?","options":["15%","18%","20%","25%"],"answer":[2],"explanation":"Profit = 900 \u2212 750 = 150. Profit% = (150 \u00f7 750)\u00d7100 = (1\/5)\u00d7100 = 20%.","hint":"Profit% = (Profit\/Cost Price)\u00d7100."},{"type":"single","prompt":"A car travels 90 km in 1.5 hours. What is its speed?","options":["50 km\/h","55 km\/h","60 km\/h","65 km\/h"],"answer":[2],"explanation":"Speed = Distance \u00f7 Time = 90 \u00f7 1.5 = 60 km\/h.","hint":"Divide distance by time to get speed."}]
