Multiplication principle - practice for 13 year olds - page 10 of 11
Number of problems found: 201
- Three digits number
How many are three-digit integers such that they have no digit repeats? - Seven-segmet
Lenka is amused that he punched a calculator (seven-segment display) number and used only digits 2 to 9. Some numbers have the property that She again gave their image in the axial or central symmetry some number. Determine the maximum number of three-dig - Logik game
Letter game Logik is a two-player game that has the following rules: 1. The first player thinks five-letter word in which no letter is not repeated. 2. The second player writes a five-letter word. 3. The first player answers two numbers. The first number - Pairs
Teachers must choose one pair of boys and girls from the five girls and four boys. A) How many such pairs of (M + F)? B) How many pairs were only boys (M + M)? C) How many are all possible pairs?
- Task of the year
Find the number of integers from 1 to 106 with ending four digits 2015. - Cars plates
How many different license plates can a country have since they use 3 letters followed by 3 digits? - Lock
A combination lock will open when the right choice of 3 numbers (from 1 to 16 inclusive) is selected. A. How many different lock combinations are possible? B. Is the combination lock named appropriately? - Coin and die
Flip a coin and then roll a six-sided die. How many possible combinations are there? - Words
How many 2 letters "words" are possible using 14 letters of the alphabet? a) without repetition b) with repetition
- Shelf
How many ways are there to arrange 6 books on a shelf? - Kids
How many different ways can sit 8 boys and 3 girls in line if girls want to sit on the edge? - Components
The 8 white, 4 blue, and 2 red components are in the box. What is the probability that we pull one white, one blue, and one red component without returning it? - Scrap
From 19 products are 4 scraps. What is the probability that the random pick of 2 products has no defective product? - Pizza
A school survey found that 10 out of 15 students like pizza. If 5 students are chosen randomly, what is the probability that all 5 students like pizza?
- Rectangles
How many rectangles with area 3152 cm² whose sides are natural numbers? - Flags
How many different flags can be made from green, white, blue, red, orange, yellow, and purple materials, so each flag consists of three different colors? - Bits, bytes
Calculate how many different numbers can be encoded in a 16-bit binary word. - Guests
How many ways can 8 guests sit down on 10 seats standing in a row? - Chess
How many ways can you select 4 fields on a classic chessboard with 64 fields so that fields don't have the same color?
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Multiplication principle - math word problems. Maths practice for 13 year olds.