Maths practice for 14 year olds - page 221 of 297
Number of problems found: 5923
- Four-digit 3912
Create all four-digit numbers from digits 1,2,3,4,5, which can repeat. How many are there? - Cuboid enlargement
By how many percent increases the volume of the cuboid if every dimension increases by 30%? - Pet store
They sold fish from one aquarium from the breeding product (Zverimex). Ondrej wanted half of all the fish, but to avoid cutting any fish, he got half the fish more than he wanted. Matej wanted half of the remaining fish, but like Ondrej, he got half the f - Three friends
Three friends divided the profit by 104,650 CZK, so that for every 4 CZK, which got the first friend equals five crowns for the second, and for every 9 CZK, which got the second equals 16 CZK for the third. Question: Who got the most and how much?
- Unknown number 7
16% of the unknown number is 21 less than the unknown number itself. Determine the unknown natural number. - Three children
Three children eat eight chocolates in 6 days. How many chocolates do six children eat in 18 days? - Percentage 3892
The bar contains 81g of coconut per 200g. What percentage of coconut does the bar have? - Probability 3891
Michal chose blue, white, red, orange, black, and brown shorts. What is the probability that he will select blue shorts? - Sum of members
What is the sum of the first two members of the arithmetic progression if d = -4.3 and a3 = 7.5?
- Expression 3887
Determine what z equals in the expression 169^z = 2 · 6.5 - Chocolate 3886
Chocolate has 86% cocoa. Determine how many grams of cocoa are in 165-gram chocolate. - Equation: 3881
What is the solution of the equation: 2^x = 2/64 - Difference 3878
Determine the difference between members of AP and find the third term: 7; 3.6;... - Difference 3875
The four numbers are in a ratio of 5:7:4:6. Their difference is equal to -84. Specify these numbers.
- Determine 3873
Determine the ratio of the square root of number 27 and the square root of number 16. - Difference 3870
The difference between the two numbers is 16. They are natural numbers. The first number is 17 times larger than the second number. Identify both of these numbers. - Exponential equation
Determine the value of having y in the expression (3^y): (4-1)=36. Unknown y is a natural number greater than zero. - Rectangle
The perimeter of a rectangle is 48 cm. Calculate its dimensions if they are in the ratio 5:3 (width: height) - Money duo
Julius and Mark have 45 euros together. Mark has 50% more money than Julius. Determine the amount of money that has Mark and Julius.
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