Two pipes A and B can fill a tank in 15 hours and 20 hours, respectively. Another pipe C can empty the tank in 30 hours. If all three pipes are opened t...
A car starts from point A and travels at a speed of 40 miles per hour. After 1 hour, a second car starts from point A and travels in the same direction ...
72, 81, 99, ?, 162, 207
How many different signals can be formed using 3 red, 2 green, and 1 yellow flag?
67.2, 8.4, 1.2, 0.2, 0.04, ?
Two years from now, a father's age will be twice the age his son was two years ago. Additionally, four years ago, the ratio of the father's age to the s...
A factory has 3 machines A, B, and C. Machine A produces 40% of the total output, B produces 35%, and C the remaining. It is known that 5% of items fro...
If the ratio of boys to girls in a class is 3:4 and the total number of students is 56, how many boys are there?
Quantity I: The distance a truck travels from point P to point Q, given that a bike covers the same distance in 2 hours. The tru...
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