Real numbers - practice problems - page 5 of 9

Number of problems found: 161

Equation with abs value
How many solutions has the equation (|x| +x) |x-3| = |x+1| in the real numbers?
Logarithmic equation
Solve equation: log₁₃(7x + 12) = 0
Exponential equation
Solve exponential equation (in real numbers): 2^3x-6=9
Halfway 82508
Which number is halfway between a quarter of a fifth and a half of a third on the number line?
Discounts on rail (ZSSK)
The railway company ZSSK offers a discount of 40% (SENIOR RAILPLUS) for 9.9 Eur/year. Calculate the real discount rate as a percentage, where passengers will travel 5 Eur per week.
Wire D
Wire length 6 m is bent to form a semicircle circuit (including the diameter). Determine the radius of the semicircle.
Rectangle SS
The perimeter of a rectangle is 154 dm, and its diagonal is 62.36 dm. Find the dimensions of the rectangle.
EQ2 - symetric results
Given the function y = x² - 4x + 3. Determine all real numbers z such that g(x) = g(-2).
Permutations with repetitions
How many times can the input of 1.2.2.3.3.3.4 be permutated into four digits, three digits, and two digits without repetition? Ex: 4 digits = 1223, 2213, 3122, 2313, 4321. . etc 3 digits = 122.212.213.432. . etc 2 digits = 12, 21, 31, 23 I have tried the
Forestry workers
84 laborers have employed planted trees in the forest. For 9 hour work, a day would end job in 38 days. After 18 days, 6 laborers go forth? How many days are needed to complete planting trees in nurseries by others if they work 12 hours a day?
Sequentially pick
There are 6 different tickets marked with numbers 1 to 6 in the pocket. In how many different ways can we sequentially, taking into account the order, choose three of them, if the chosen tickets return to the pocket?
Distance of numbers
Which number has the same distance from the numbers -5.65 and 7.25 on the numerical axis?
Unknown 63224
You will find an unknown number on the number line between 428 and the unknown number 290.
Marlon
Marlon drew a scale drawing of a summer camp. In real life, the sand volleyball court is 8 meters wide. It is 4 centimeters wide in the picture. What is the drawing's scale factor? Simplify your answer and write it as a ratio, using a colon.
Crystal
The crystal grows every month at 1.2 permille of its mass. How many months does it take to develop from weight 177 g to 384 g?
On the number line
What number is exactly in the middle between 9.8 and -2.4 on the number line?
Numbers 82720
Which number is also distant from the numbers 5.3 and 7.7 on the number line?
An aquarium
An aquarium tank that measures 2.4 m high, 6 m long, and 1.5 m wide and is filled with water. The density of water is 1,000 kg/m³. What is the mass of the water in the tank?
Scientific notation
Approximately 7.5x10⁵ gallons of water flow over a waterfall each second. There are 8.6x10⁴ seconds in 1 day. Select the approximate amount of water flowing over the waterfall in 1 day.
2x cone
Circular cone height 36 cm was cut plane parallel with the base. The volume of these two small cones is the same. Calculate the height of the smaller cone.

«
1
2
...
4
5
6
...
8
9
»

Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.