Math practice for 13 year olds - page 332 of 423

Number of problems found: 8456

Determine 3841
Determine the value of x: 2^x = (2^-3): 2
Determine 3840
Find z if 12^z = 1/144
Tetrahedral prism
Calculate the area and volume of a tetrahedral prism that has a base rhomboid shape, and its dimensions are: a = 12 cm, b = 70 mm, v_a = 6 cm, v_h = 1 dm.
Probability 3835
We have four red, three blue, six yellow, and two black balls in the bag. Find the probability of pulling the blue or red ball.
Volume and area
What is a cube's volume with an area of 361 cm²?
Daniel 3833
Dano has 50% more money than Milos. Jarka has 4 euros more than Miloš. They have a total of 52 euros. Find how much money Daniel, Miloš, and Jarka have.
First man
What is the likelihood of a random event where are five men and seven women will first leave the man?
Determine 3829
Determine the sum of the first three members of GP if q = 2 and a4 = 2.4.
Equation
Solve the equation: 1/2-2/8 = 1/10; Write the result as a decimal number.
Determine 3826
Determine 120% of numbers 16, 32, 48, and 52.
Previous 3824
There are 48 bottles in the third row, seven fewer in each row than in the previous row. Find the number of bottles in the first row.
Numbers 3823
The sum of the two numbers is 48. 12.5% of the first number equals exactly 4. Find both of these numbers.
Determine 3821
Determine y: 32^y = 2
One-fourth 3820
Darius said to Miloš: I think a number. If I square it to one-fourth and then multiply it by 3, I get its square root. Find the unknown number that is greater than zero and belongs to the set of positive integers.
Diagonals
The diagonal of a rhombus is 20 cm long. If its side is 26 cm, find the length of the other diagonal.
Probability 3813
Natalia went to the closet to pick out Daniel's briefs. Daniel has one piece of white briefs and one piece of black briefs in the closet. What is the probability that Natalie will take off his white briefs?
Expression 3811
Determine what y equals in the expression 5^y = 1/25
Mean
The mean of 50 items for a student's food is 38.6. When checking the work, he found that he had taken one item as 50 to read as 40 correctly in these circumstances. What should the correct arithmetic mean?
Expression: 3804
Specify the value of the expression: (1024^0.1): 9
Calculate 3803
Calculate the value of y: 3^y = 0.333

Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.