A jar holds 40 litres of pure juice. 10 litres are taken out and replaced with water, and the process is repeated once more. What is the final ratio of juice to water?
Correct answer D. 9:7
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Maths MCQs & Aptitude MCQs
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A vessel contains milk and water in the ratio 3 : 1. What fraction of the mixture must be drawn off and replaced with water so that the ratio becomes 3 : 2?
Correct answer D. 1/5
A shopkeeper mixes 15 kg of lentils costing Rs. 40 per kg with 25 kg of lentils costing Rs. 56 per kg. What is the cost of the mixture per kg?
Correct answer B. Rs. 50
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How many litres of a 50% acid solution must be added to 30 litres of a 20% acid solution to obtain a 30% acid solution?
Correct answer D. 15 litres
A 40 kg salt solution contains 15% salt. How much water must be evaporated so that the solution contains 20% salt?
Correct answer D. 10 kg
What is the angle between the hour hand and the minute hand of a clock at 2:30?
Correct answer B. 105°
What is the angle between the hands of a clock at 7:20?
Correct answer C. 100°
What is the smaller angle between the hands of a clock at 9:45?
Correct answer C. 22.5°
What is the smaller angle between the hands of a clock at 11:10?
Correct answer C. 85°
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What is the angle between the hands of a clock at 6:48?
Correct answer C. 84°
What is the reflex angle between the hands of a clock at 1:40?
Correct answer B. 190°
At what time between 2 and 3 o’clock will the hands of a clock coincide?
Correct answer D. 10 10/11 minutes past 2
At what time between 1 and 2 o’clock will the hands of a clock point in exactly opposite directions?
Correct answer C. 38 2/11 minutes past 1
At what time between 4 and 5 o’clock will the hands of a clock first be at right angles?
Correct answer A. 5 5/11 minutes past 4
At what time between 6 and 7 o’clock will the hands of a clock be together?
Correct answer C. 32 8/11 minutes past 6
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At what time between 5 and 6 o’clock will the hands of a clock first make an angle of 30°?
Correct answer B. 21 9/11 minutes past 5
A clock gains 5 minutes every hour. It is set right at 6 a.m. What is the true time when the clock shows 7 p.m. the same day?
Correct answer A. 6 p.m.
A clock loses 3 minutes every hour. It is set right at 12 noon. What is the true time when the clock shows 9:30 p.m. the same day?
Correct answer A. 10 p.m.
A clock gains 12 minutes every 24 hours. It is set right at 6 a.m. on Monday. What is the true time when it shows 12:15 p.m. on Tuesday?
Correct answer A. 12 noon on Tuesday
Through how many degrees does the hour hand of a clock turn between 3:15 and 5:45?
Correct answer A. 75°