Math practice for 13 year olds - page 123 of 414
Number of problems found: 8276
- Pool filling time
How long in an hour will a 30 m, 15 m, and 2 m pool be filled with water flowing at 900 l / min if it is 90% full? - Number logical sequence
The numbers are arranged in a specific logical order. Fill in the missing numbers. 5, 8, 16, 15, 18, 36, 35, 38,??, - Mr. Bradshaw
Mr. Bradshaw is leaning a ladder against the side of his house to repair the roof. The top of the ladder reaches the roof, which is 5 meters high. The ladder's base is 1 meter away from the house, where Mr. Bradshaw's son is holding it steady. How long is - For last
Last week, the temperature varied by a total of 17 degrees over the course of the day. If the high for the day was 10 degrees, what was the low? (Write a number sentence and solve it.) - Starter current flow
Determine the current flowing through the car's starter, whose resistance is 60 milliohms at 12 V. - Resistor series connection
Two resistors with resistances of 40 ohms and 60 ohms are connected in series and connected to a voltage of 150 V. A) the total resistance B) current in the circuit C) voltage on both resistors - Handset voltage resistance
The handset has a resistance of 4000 ohms. Calculate what voltage is connected to them if the current passes 2.5 mA. - Shoe discount price
They reduced the shoes by CZK 132 to 85% of the original price. How much did they cost before the discount? - Class boy girl ratio
In the 9th grade, the ratio of boys to girls is 1:3. There are a total of 24 students in the class. How many boys and how many girls? - Apple seller households
The door-to-door seller of domestic apples sold 40% of the apples in the first household, 20% of the rest in the second, and 24 kg in the third. How many kilograms of apples did the seller sell to the first two households together? - Chickpea can comparison
The grocery store has chickpeas in brine from two manufacturers, A and B. On a can from one manufacturer, it says: Solids weigh 240 g, weighing 400 g. The other manufacturer states: weight solid 245 g, weight 410 g. Which manufacturer sells canned food wi - TV discount price
The TV fell first by 20%, then by 10%. How much did it cost after the second discount if: A) before the first discount cost 450eur? B) after the first discount, cost 450eur? - Potato price reduction
Mr. Joseph sold home-grown potatoes at 79 cents per kilogram. When he had the last 5 kg, he told the customer: collect them all for 3 euros! By what percentage did Mr. Joseph reduce the potatoes? - Tablet double reduction
The Shop first reduced the tablet price by 10% and later reduced the new price by 20%. What was its original price after the tablet cost € 720 to double the reduction? - Calculate cone - S,V
Calculate the surface and volume of a rotating cone, the base of which has a diameter of 6 cm and a height of 4 cm. - Square area increase
The area of the square is 36 cm². What will be the area of the square if we increase the length of a side by 25%? - The temperature 27 The temperature in Chicago was −12 °C. Over 4 hours, the temperature rose by 3 °C every hour. What was the temperature after 4 hours?
- Triangle construction sides
Construct a right triangle ABC with the hypotenuse AB: a) | AB | = 72 mm, | BC | = 51 mm b) | AB | = 58 mm, | AC | = 42 mm - Ticket number probability There are 100 tickets in a pocket with the numbers 1 to 100. What is the probability that we will randomly draw a ticket with a number starting with the number 5?
- Map scale length
Calculate the scale of the map, at which the actual distance of 12.6 km will be on the map as a distance of 2.52 cm.
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