Maths practice for 14 year olds - page 76 of 370
Number of problems found: 7393
- The radius
A right circular cone's radius and slant heights are 9 cm and 15 cm, respectively. Find, correct to one decimal place, the (i) Height (ii) Volume of the cone - A Shopkeeper 4
A Shopkeeper gave a bill to a customer. The bill was in two digits but was mistakenly interchanged, thereby undercharging the customer by $45.00. If the sum of the digits is 9, find the actual value of the bill. - The cost 5
The cost of three chairs and four tables is 320.00. If two chairs and five of the same kind cost 330.00, find the cost of (i) 4 chairs (ii) 3 tables - Electric charge
The electric current in a microprocessor circuit is 0.230 μA. How many coulombs pass a given point in the circuit in 1.50 ms? - In triangle 2
In triangle XYZ, if it measures angle X=40° and measures angle Y=75°. Which is the longest side of the triangle, and why? - The profit 2
Jo buys 120 bunches of daffodils for a total of £80 and 80 bunches of tulips for a total of £50. Jo then sells the flowers in a market. In the morning, Jo sells 75 bunches of daffodils for 80p a bunch and 50 bunches of tulips for 90p a bunch. In the after - Four digit codes
Given the digits 0-7. If repetition is not allowed, how many four-digit codes greater than 2000 and divisible by 4 are possible? - Estimate linear fx
Which of the following is the best estimate for the temperature at 11 PM if the temperature continues to drop at the same rate? time; temperature °C 3 PM; 32 6 PM; 30 12 PM; 20 - Intersection 74914
Find the perimeter of triangle ABC, where point A begins the coordinate system. Point B is the intersection of the graph of the linear function f: y = - 3/4• x + 3 with the x-axis, and C is the intersection of the graph of this function with the y-axis. - A speedboat
A speedboat goes 900 km against a current of 25 km/hr. Its trip took 10 minutes longer than it would have taken to travel with the current. What is the speedboat's speed in still water? - Commission rate 2
Peterson sold a house and lot worth Php 2,000,000.00. If the owner gave him Php 110,000.00 as a commission, what would be the commission rate? - Percentage 74844
The bar contains 12 grams of sugar per 50 grams. What percentage of sugar does the bar have? - A cuboid 2
A cuboid with a depth of 4 cm but a length and width of x cm is cut out from one corner of the original cuboid as shown (the original cuboid has dimensions of 10x8x4 cm). The remaining shape has a volume of 199 cm³. Calculate the value of x. - Wood floats
A wooden cylinder with a diameter of 20 cm and a length of 1 m is immersed in water. The specific weight of wood is 700kg/m³. For example, calculate the height of the wood that is above the water. The role was assigned to me as a high school freshman math - LCM of polynomials
Find the lcm of 4x³ + 8x² and 5x² -20 - Measured 74724
How long would a tourist walk the route if he measured 24.9 cm on a map with a scale of 1:25000? The marching speed is 4 km/h. - A rectangle 12
A rectangle has a width of 7.2 cm shorter than its length. The perimeter of this rectangle is 22.8 cm. Write the width-to-length ratio of this rectangle in the simplest form and show how you solve the problem. - A book 2
A book priced at USD25 is sold at a 30% discount at a bookstore. If the same book is sold online for USD20, buyers are given a 15% discount. Applying the concept of proportion, determine the better option for purchasing the book. Justify your choice. Writ - The slope
Find the slope of the line that passes through the following two points: (-3, 16) and (-5, 30) Give your answer as a number, rounded to the nearest tenth, if necessary. - Some rice
Rose had some rice. She gave 1/4 of it to her sister and cooked 1/6 of the remaining. What fraction of the rice did she cook? b. If she cooked 1⁄2 kg of rice, how much rice did she have at first?
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