# Themes, topics - math problems

#### Number of problems found: 1186

• Mushrooms The ratio of dry matter and water is 1: 9 for most mushrooms. Dry matter consists of carbohydrates, proteins, minerals, fat and water in a ratio of 50: 30: 8: 3: 9. How many kg of fresh mushrooms need to be processed into a 10 kg package of dried mushroom
• The tourist The tourist will cross a 5 km long section in 3 hours. Part of the journey goes at a speed of 0.8 m/s and the other part at a speed of 0.4 m/s. Find the length of the first and second part of the journey.
• Two forces 3 Two forces of magnitude 8 Newtons and 15 Newtons respectively act at a point. If the resultant force is 17 Newtons, find the angle between the forces.
• 10 workers 10 workers will perform the assigned work in 8 days. How long will it take to get the job done if 6 workers work for six days and then another six join them?
• Tandem jump During the tandem jump, the paratroopers dropped from a height of 1.7 km to a height of 1.5 km above the surface in 4 seconds. At what average speed did they move before the parachute opened?
• Treasure map On a treasure map, the actual distance is directly related to the scaled distance. If 15 miles is represented by 3 centimeters on the treasure map are equivalents to 135 miles?
• Tunnel Kubo sits on a train speeding at 108 km/h. At that moment, the train entered the tunnel, which according to Kub's book is 2 km long. Kubo noticed that the end of the train had left the tunnel 75 seconds later than the locomotive had entered the tunnel. Wh
• AND-NOT-AND If P is the set of multiples of 2, Q is the set of multiples of 3, and R is the set of multiples of 7, which of the following integers will be in P and Q but not in R? A=−54 B=−50 C=42 D=100 E=252
• Cooker spiral A current of 4.4 A flow through the spiral of the electric cooker at a voltage of 220 V. What is the resistance of the spiral?
• At what At what speed did the motorist drive when he reacted by noticing the obstacle by 0.8 s; the magnitude of the opposite acceleration during braking was 6.5 m/s ^ 2 and the car ran to a stop track 35 m?
• Power consumption The price of electricity is ₱6.50 per kilowatt hour (kWh). If a television with 120 W power consumption ran from 7:30 AM to 12:30 PM, how much electricity was consumed?
• Manganin How long must a manganin wire with a diameter of 0.8 mm have to have a value of 10Ω?
• Three robots In a workshop, three robots, Q, R and S, are employed to make chairs     Robot Q makes 25% of the chairs   Robot R makes 45% of the chairs   The remaining chairs are made by Robot S     Evidence has shown that 2 percent of the chairs made by robot Q are d
• Two fertilizers Jason is testing two fertilizers, Grow Well and Green Grow, so he went to a nursery and bought 50 tomato plants of the same variety. He planted all 50 plants in an identical environment. He then administered Grow Well to 25 of the tomato plants and Green
• 24carat gold The goldsmith cast 22 carat gold and 14 carat gold and earned 20 dkg of 18 carat gold. How much gold did he use?
• Two places The actual distance of the two places is 105 km. Find the scale of the map on which this distance is marked by a line 1.2 dm long.
• The temperature 17 The temperature was -5 Celsius at 6 AM. It increased force of three degree every hour for six hours the temperature then increased 1 1/2° every hour for five hours. What was the temperature at 5 PM?
• School student The probability that a school student has a skateboard is 0.34, the probability that he has a bicycle is 0.81 and the probability that he has a skateboard and a bicycle is 0.22. What is the probability that a randomly selected student has a skateboard or
• Train Find the average speed of a train (in km/h) that passes a telegraph pole in 7 seconds and passes a 378 m platform in 25 seconds. How long is the train?
• The space The space rocket orbits the Earth at an altitude of 400 km above the Earth's surface. Determine the magnitude of the centrifugal acceleration of the rocket in its orbit.

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