Math practice for 13 year olds - page 107 of 428
Number of problems found: 8555
- Coffee 6
Coffee worth $1.05 per pound is mixed with coffee worth 85 cents per pound to obtain 20 pounds of a mixture worth 90 cents per pound. How many pounds of each type is used? - 5 times
Find an unknown number; if five times as large as 110 is 1/2 of what number? - Car parking ways
How many ways can ten cars park side by side in a parking lot? - Casserole diameter volume
The casserole with a volume of V = 4.5 l has a depth of h = 10 cm. Calculate its inside diameter. - Triangle perimeter ratio
The perimeter of the ABC triangle is 19.6 cm. The following applies to the lengths of its sides: a: c = 1:2, b: c = 5:6. Calculate the lengths of all sides of the triangle ABC. - Syrup lemonade ratio
There is information on the syrup bottle that it is recommended to dilute it in a ratio of 1:6. How much lemonade would we make if we bought a bottle of syrup with a volume of 0.5 l? - Apple box picking
Karel, Peter, and Milan helped pick apples. It took Karl 30 minutes, Peter 45 minutes, and Milan 36 minutes to turn over one full box of apples. Calculate how long it would take them to acquire 3 full crates together. Mark one answer: a. 32 minutes b. 36 - A man 5
A man secured a loan from a bank and used 1/4 of it for a building project and 1/3 of it for a farm, and 15000 was left. How much did the man secure from the bank? - Park work groups
Two working groups are adjusting the park. The first group will do the work in 15 days and the second in 25 days. How many days will they work together? - Number arithmetic mean
The arithmetic mean of two numbers is 12. The first number is 5. What is the value of the second number? - Dimensions of a prism
Calculate the edge c and the surface S of a block if its volume is equal to 42 cubic centimeters, a = 6cm, b = 3.5cm, c =? - Trapezoid 45
Trapezoid with: Area: 345 1/2 sq cm First base = 15 1/3 cm height= 4 1/5 cm What size is the second base? - Square diagonal perimeter
Calculate the diagonal and the area of a square if its circumference is 10 centimeters. - Fencing material
Ailey bought 10 meters of wire fencing material to enclose her triangular flower garden. If the lengths of the sides of the triangular garden are 2 ½ meters, 3 ⅔ meters, 2 ⅙ meters, how long will the excess wire fencing material be? - Two tangents
The figure shows a circle k with centre S and radius 5 cm, and a point A which is 13 cm from centre S. From point A, two tangents p and q are drawn to circle k, with points of tangency P and Q. In addition, another tangent t is drawn to circle k, which in - Length and width
Use the 5-step procedure. The perimeter of a rectangle is 34 in. The length is 4 in less than three times the width. Find the length and width. - Clarissa 2
Clarissa is cutting construction paper into rectangles for a project. She needs to cut one 12 inches x 15 1/3 inches rectangle. She needs to cut another rectangle 10 1/4 inches by 10 1/3 inches. How many Total square inches of construction paper does Clar - Table tablecloth material
The table top is 1.2 m long, 55 cm wide, and 35 mm thick. Calculate how many regular meters of a 1 m wide roll are needed for a tablecloth that extends 15 cm beyond the bottom edge of the table on all sides. - Circular grass seed
How many kg of grass seed must be bought to start a lawn in the shape of a circular section with a radius of r= 15 m and a central angle of 45 degrees if 1 g of grass seed is used per 1 dm of the square area? - Fountain grass seed
How many kg of grass seed should be bought to establish a lawn around a circular fountain with a diameter of 5 m if the lawn is to be 1.5 m wide and 1 g of grass seed is used per 1 dm of the square area?
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