Maths practice for 12-year-olds - page 357 of 362
Number of problems found: 7228
- 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 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 - 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. - 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? - Ratio v2
Decrease in the ratio 8:16 number 20.2. - Ratio Increase the number 25.6 in the ratio 7:4.
- 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.
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