Math practice for 13 year olds - page 103 of 413
Number of problems found: 8253
- Flower bed tiles
A gardener lays tiles around a square flower bed. It needs 12 tiles around the 2x2 bed. How many tiles will he need around the size of the bed? a) 9x9 b) nxn? How big was the bed for which the gardener consumed c) 112 d) 4n tiles? - Point symmetry coordinates
In the rectangular coordinate system, find the images of points A[-3; 2] and B[4; -5] in central symmetry according to point O[0; 0]. A. A'[3; 2], B'l-4; -5] C. A'[-3; -2], B'[4; 5] B. A'[-3; -2], B'[-4; 5] D. A'[3; -2], B'[-4; 5] - The product 8
The product of five and the difference of triple the number and three is 25. Find the number. - Seed germination calculation
Out of 150 seeds, 12 did not germinate. How many seeds will not germinate if we sow 450 of them? - Six segmants
Given are 6 line segments with lengths of 3 cm, 4 cm, 5 cm, 7 cm, 8 cm, and 9 cm. How many equilateral triangles can make from them? List all the options. - A bus 3
A bus has a petrol tank in the shape of a cylinder. The cylinder is 125 cm long and has a diameter of 42 cm. (i) How much will a full tank of petrol cost at the rate of 5.23 per liter? (ii) If the bus uses petrol at 12.5 liters for every 50 km, how far ca - The interior
The interior angle of a regular polygon is x. If x is 9° less than the average of 153° and 145°, find the number of sides of the polygon. - 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. - Share money Three Friends shared an amount in the ratio of 2/3 : 3/5: 1/4. Suppose the largest share was Le 12,000.00. How much was shared between them?
- 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? - Express value
Given that p = √(mx/t-t² x) Make x the subject If m = 7, p = -3 and t = 4, find the value of x - 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 - The average 6
The average temperature dropped 16 °C over a period of 5 weeks. What is the average change in temperature per week? - An isosceles 2
An isosceles triangular frame has a measure of 72 meters on its legs and 18 meters on its base. Find the perimeter of the frame. - Length in yds
Find the area of a rectangle with a length of 4 3/4 yards and a width of 1 1/16 yards. - Bar sugar percentage
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. - A cuboid
A cuboid has a volume of 768 cm3, and the edges marked x are equal in length. Calculate the value of x
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