Math practice for 13 year olds - page 366 of 413
Number of problems found: 8260
- Five girls
Five girls are traveling by bus. Each holds in each hand two baskets. In each basket are four cats. Each cat has three kittens. Two girls exit the bus. How many legs are on the bus? - Bath salts
Bath salt A weighs 900 grams and costs 36,40 CZK. Bath salt B weighs 1000 grams but costs 85 CZK. How much is a bath salt A cheaper than B salt? - Grandson and granddad
Grandson with Grandpa counted how many years they had together. Their product is 365. How many years is the sum of their years? - Water lake
The length of the lake water is 8 meters, width 7 meters, and depth 120 centimeters. How many liters of water can fit into the water lake? - Two boxes-cubes
Two boxes of a cube with edges a=28 cm and b = 92 cm are to be replaced by one cube-shaped box (same overall volume). How long will its edge be? - Equilateral cylinder
The equilateral cylinder (height = base diameter; h = 2r) has a V = 178 cm³ volume. Calculate the surface area of the cylinder. - Masons
One bricklayer lays 30.8 m² of masonry in 8 hours. How long will it take four bricklayers to lay 178 m²? - Chord AB
What is the chord AB's length if its distance from the center S of the circle k(S, 50 cm) is 43 cm? - Silver medal
A circular silver medal with a diameter of 10 cm is an inscribed gold cross consisting of five equal squares. What is the area of the silver part? b) What is the area of the Golden Cross? - Rectangle and circle
The rectangle ABCD has side lengths a = 40 mm and b = 30 mm and is circumscribed by a circle k. Calculate approximately how many centimeters a circle is long. - The star
Find the area of the shaded part of a square with a side of 22 cm. - Clocks
What distance will describe the tip of a minute hand 6 cm long for 20 minutes when we know the starting position with finally enclosed hands at each other at 120°? - Annulus
Two concentric circles form an annulus with a width of 10 cm. The radius of the smaller circle is 20 cm. Calculate the area of the annulus. - Arc
What area is occupied by flowers planted in a circular sector with a radius of 3 m and a central angle of 45°? - Two circles
Two circles with a radius of 4 cm and 3 cm have a center distance of 0.5 cm. How many common points have these circles? - Jane and Miro
Jane's brother Martin is 42 years old. He is three times as old as Jane when Martin was for as many years as there are now Jane. How old is Jane? - Circle sector
The circular sector with a central angle 160° has an area 452 cm². Calculate its radius r. - Janitor
The janitor tosses 28 cm layer of snow on the school grounds for 90 minutes. How many friends would have to call for help if snow needs to have bowled for 15 minutes? We assume that at the same time, we all have the same amount of snow. - Troops - soldiers
Food stocks will last 20 soldiers during the four-day training. If four soldiers become sick, how many days could they extend training? - Pumps 3
Two pumps of the same power fill the garden pool for 10 hours. How many of these pumps would we have to use if we want to shorten the filling of the pool to four hours?
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