Multiplication - practice for 14 year olds - page 3 of 23
Number of problems found: 455
- Different 82447
How many 4 colored flags can be made from 5 colors so that each flag consists of three different colors? - Repeated 82330
How many 5-digit numbers can we create from the number 1,2,3,4,5 if the one's place is to have the number 5? (digits must not be repeated.) - Five-digit 82257
Determine the number of all five-digit natural numbers in which every two digits are different in decimal notation. - Discovered 82210
At the dance party, the organizer discovered that 168 different dance pairs could be formed from girls and boys. How many boys are there at the dance if there are 12 girls?
- Increase 82151
Increase 380 by 28% - Rectangle 82087
A 9cm × 15cm rectangle is divided into unit squares. How many paths are there from one rectangle vertex to the opposite vertex if one can only go to the right and up the sides of the squares? - Repetition: 82003
Calculate how many different monograms (short name and surname) I can make from the letters A, E, M, Z, and K. a) with repetition: b) without repetition: - We randomly
We randomly select a three-digit number. What is the probability that the number 8 occurs at most once in its notation? - Probability 81637
We randomly select three different points from the vertices of a regular heptagon and connect them with line segments. The probability that the resulting triangle will be isosceles is equal to: (A) 1/3 (B) 2/5 (C) 3/5 (D) 4/7
- Consecutively numbers
How many ways are there to arrange the numbers 3, 2, 15, 8, and 6 so that the even numbers are arranged in ascending order (not necessarily consecutively)? - Probability 81591
We roll the dice three times. Calculate the probability of getting an even number on the first, second, or third toss. - Probability 81446
What is the probability that each digit is different in a five-digit number? - Library 81232
Lenka has 30% fewer books in her library than Filip but 40% more than Ivan. Filip has 250 books. How many books does Ivan have? - Follows: 80998
The three friends divided the money earned as follows: Tonda got 2/5, Karel 2/9, and Jirko took the rest of CZK 102. How much did each of them earn?
- Three 220
Three numbers are in a ratio of 2:3:4. Find the second number if their sum is 306. a. 68 b. 102 c. 136 d. 140 - One-nineth as percent
What is 1/9 as a percent? Round to the nearest hundredth. . - Chessboard 80533
How many ways can one white and one black square be selected on an 8x8 chessboard if the selected squares cannot lie in the same row or column? - Grazing 80444
Forty sheep graze in the meadow. There are 4 times more whites than blacks. How many white and how many black sheep are grazing in the meadow? - All-natural 80304
Determine the number of all-natural five-digit numbers in decimal notation that each have the digits 0, 1, 3, 4, 7.
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