Maths practice for 12-year-olds - page 305 of 309
Number of problems found: 6169
- Circumscription
Calculate the radius of the Circumscribed circle in the rectangle with sides 20 and 19. Can it be a rectangle inscribed by a circle? - Cable
The cable consists of 8 strands, each strand consisting of 12 wires with a diameter of d = 0.5 mm. Calculate the cross-section of the cable. - Money
Everyone complains about the lack of money. There is no shortage of money but a relative scarcity of goods and things people buy for the money. Calculate what percentage of the price of all goods and services immediately rose if everyone has the day-to-da - Determine the number
Determine the number x that x+8 is (7)/(5) from one half of 7 x -1.
- Rates
When gas consumption, the consumer may choose one of two rates: rate A - which pays 0.4 € per 1 m³ of gas a flat monthly fee of 3.9 € (regardless of consumption) rate B - which pays 0.359 € per 1 m³ of gas a flat monthly fee of 12.5 € From what monthly co - Diagonal
Can it be a diagonal diamond twice longer than its side? - 3-bracket 3
Two angles in a triangle are 90° and 60°. 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?
- Chord
The point on the circle is the endpoint of diameter and endpoint of the chord length of the radius. What angle between chord and diameter? - Numeric question
Is it possible a negative, irrational number? - Aircraft
Flight length 3457 km took 5 hours. The airport passengers had to arrive hours in advance, 2 hours. Departure was delayed for 6.4 hours. The destination airport formalities took 0.4 hours. Calculate the average speed of passenger travel from arrival to le - Number
Is number 2.8814789 irrational? - Trunk
Calculate the length of the biggest fishing rod that can be inserted into the trunk of a car with dimensions 152 x 82 × 81 cm.
- Box
Calculate the angle between box base 9 x 14 and body diagonal length 18. - Observatory
The observatory dome has the shape of a hemisphere with a diameter d = 14 m. Calculate the surface. - Rotating cone II
Calculate the area of the surface of a rotating cone with base radius r=15 cm and height h=13 cm. - Rotating cone Calculate the volume of a rotating cone with base radius r=8 cm and height h=18 cm.
- Is right?
Is a triangle with sides 51, 56, and 77 right triangle?
The average of 5 numbers is 108. What is its sum?Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
