← Back to Quizzes Hints: 2/2 Numbers Set – 11 Medium Start Your name (optional): Share Certificate Browse Quizzes Play Again [{"type":"single","prompt":"96 \u00f7 4 \u00d7 5 = ?","options":["100","110","120","125"],"answer":[2],"explanation":"96 \u00f7 4 = 24, then 24 \u00d7 5 = 120.","hint":"First divide, then multiply."},{"type":"single","prompt":"Find the next number in the series: 12, 20, 32, 48, ?","options":["60","64","68","72"],"answer":[2],"explanation":"Differences are +8, +12, +16 \u2192 each time +4 more. Next difference = 20 \u2192 48 + 20 = 68.","hint":"Look at how the gaps between numbers increase."},{"type":"single","prompt":"18% of 250 is:","options":["40","42","45","48"],"answer":[2],"explanation":"10% of 250 = 25, 5% = 12.5, 3% = 7.5 \u2192 25 + 12.5 + 7.5 = 45.","hint":"Break 18% into 10% + 5% + 3%."},{"type":"single","prompt":"Simplify the ratio 84 : 126.","options":["2 : 3","3 : 4","4 : 5","5 : 6"],"answer":[0],"explanation":"Highest common factor of 84 and 126 is 42. 84\u00f742=2, 126\u00f742=3 \u2192 2:3.","hint":"Divide both sides by the greatest common divisor."},{"type":"single","prompt":"The average of 32, 45, 50 and 63 is:","options":["45.5","46.5","47.5","48.5"],"answer":[2],"explanation":"Sum = 32 + 45 + 50 + 63 = 190; average = 190 \u00f7 4 = 47.5.","hint":"Add all numbers, then divide by how many there are."},{"type":"single","prompt":"A number is increased by 30% and becomes 234. What was the original number?","options":["160","170","180","190"],"answer":[2],"explanation":"Let the number be x. 1.30x = 234 \u2192 x = 234 \u00f7 1.3 = 180.","hint":"\u201cIncreased by 30%\u201d means multiply by 1.3."},{"type":"single","prompt":"The LCM of 10, 12 and 15 is:","options":["30","40","60","90"],"answer":[2],"explanation":"10=2\u00d75, 12=2\u00b2\u00d73, 15=3\u00d75 \u2192 LCM = 2\u00b2\u00d73\u00d75 = 4\u00d73\u00d75 = 60.","hint":"Take highest power of each prime factor."},{"type":"single","prompt":"Find the simple interest on \u20b94,500 at 8% per annum for 3 years.","options":["\u20b9960","\u20b91,020","\u20b91,060","\u20b91,080"],"answer":[3],"explanation":"SI = (P\u00d7R\u00d7T)\/100 = (4500\u00d78\u00d73)\/100 = 4500\u00d70.24 = \u20b91,080.","hint":"Use SI formula: Principal \u00d7 Rate \u00d7 Time \u00f7 100."},{"type":"single","prompt":"A train covers 300 km in 4 hours. What is its speed?","options":["70 km\/h","72 km\/h","75 km\/h","80 km\/h"],"answer":[2],"explanation":"Speed = Distance \u00f7 Time = 300 \u00f7 4 = 75 km\/h.","hint":"Use S = D \u00f7 T."},{"type":"single","prompt":"A can finish a work in 15 days and B in 20 days. Working together, in how many days will they finish it?","options":["7.5 days","8 days","8.6 days","9 days"],"answer":[2],"explanation":"A\u2019s 1-day work = 1\/15, B\u2019s = 1\/20 \u2192 together = 1\/15 + 1\/20 = (4+3)\/60 = 7\/60.","hint":"Add their one-day fractions, then take the reciprocal to get total days."}]
