Maths practice for 14 year olds - page 295 of 382

Number of problems found: 7626

First man
What is the likelihood of a random event where are five men and seven women will first leave the man?
Geometric progression
Determine the sum of the first three members of GP if q = 2 and a4 = 2.4.
Percentage calculation
Determine 120% of numbers 16, 32, 48, and 52.
Three friends
Danica, Helen, and Dalibor have 96 kg altogether. Helen weighs 75% more than Dalibor, and Danica weighs 6 kg more than Dalibor. Determine the weight of Danice, Helen, and Dalibor.
Bottle rows
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.
Two numbers
The sum of the two numbers is 48. 12.5% of the first number equals exactly 4. Find both of these numbers.
Exponent value
Determine y: 32^y = 2
Number puzzle
Darius said to Miloš: I think a number. If I raise it to the power of one-fourth and then multiply by 3, I get its square root. Find the unknown number that is greater than zero and belongs to the set of positive integers.
Root equation
We have 2 numbers. If we multiplied the first number's third root by the second number's square root, we would get the number 18. Determine these 2 numbers. Calculate only the integer solution if the problem has infinitely many solutions in the set of rea
Diagonals
The diagonal of a rhombus is 20 cm long. If its side is 26 cm, find the length of the other diagonal.
Geometric progression
Determine the third, fourth, and fifth GP members if a1 = -0.5 with q = -4.
Brief probability
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?
Exponent value
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?
Money distribution
Dennis has 43% more money than Damian, and Zuzana has 12% less money than Damian. They have a total of 165 euros and 50 cents. Determine how much money Dennis, Damian, and Zuzana have.
Expression value
Specify the value of the expression: (1024^0.1): 9
Exponent value
Calculate the value of y: 3^y = 0.333
Arithmetic progression
Determine the second term and the difference AP if a3 = 5 and a1 + a3 = 16.
Money distribution
Dano and Juraj have a total of 120 euros. Juraj has 40% less money than Daniel. Determine how much money Daniel and Juraj have.
Q of GP
Calculate the quotient of geometric progression if a1=5 and a1+a2=12.

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