Maths practice for 12-year-olds - page 347 of 352
Number of problems found: 7034
- Book
The printer used 4201 digits to number the pages of the thick book. How many pages does this book have? - Expansion
If one side of the rectangle is larger 2-times and the second 4-times, what percentage increases the area of the rectangle? - Potatoes
Potatoes contain 77.6% starch. How many potatoes need to obtain 71.8 kg of starch? - Colors
Arnold got birthday 7 color pens in different colors. How many ways can he give them side by side in pencil? - Map
Forest has an area of 77 ha. How much area is occupied by forest on the map at scale 1:10000? - The pipeline
How long is the pipe with an outside diameter of 1.4 m if his coloring consumed 35 kg of color? 1 kg of color coverage is 9 m². - Raffle
In the pool number from 1 to 109. What is the probability that a randomly selected number is not prime? - Divisibility
Determine all divisors of a number 91. - Inflation
What is better for people (employees)? ... - 4-gon
Is it true that a 4-gon whose two sides are parallel and the other two have equal length is a parallelogram? - Strange x
For what x is true x=19x? - Average
The arithmetic mean of the two numbers is -79.1. One number is -49. Calculate the second number. - Circumscription
Calculate the radius of the Circumscribed circle in the rectangle with sides 3 and 6. Can it be a rectangle inscribed by a circle? - Cable
The cable consists of 5 strands, each strand consisting of 11 wires with a diameter of d = 0.3 mm. Calculate the cross-section of the cable. - Square
Calculate the area of the square with diagonal 17 cm. - Determine the number
Determine the number x that x+8 is (7)/(5) from one half of 7 x -1. - Diagonal
Can it be a diagonal diamond twice longer than its side? - 3-bracket 3
Two angles in a triangle are 90° and 45°. Has the triangle at least two equal sides? - 3-bracket
Maybe the largest angle in the triangle is less than 20°? - Diagonal
Can a rhombus have the same length, diagonal, and side?
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