Basic operations and concepts - math word problems - page 258 of 322

Number of problems found: 6435

Bricks
Openings in perforated bricks occupy 10%, and brick has dimensions of 30 cm, 15 cm, and 7.5 cm. Calculate a) the weight of a perforated brick if you know that the density of the full brick material is p = 1800 kg/m³ (1.8 kg/dm³) b) the number of perforate
Metal sheets
How much metal sheet is needed to produce eight 4 m long and 12 cm in diameter gutters? During production, joints are calculated at 3% of total consumption.
Calculate 4349
Calculate x: (x-1) over (x-2) + (x-2) over (x-4) = 4
Dimensions 80753
We color a wooden block with dimensions a = 4 cm, b = 3 cm, c = 2 cm and then cut it into cubes of 1 cm³. How many cats will she have? a) just one wall painted b) just two walls stained c) just three walls painted d) no painted wall?
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)?
Seven segments display
Electronic devices sometimes use the type of digits below, where each digit uses some short stripes. For example, seven uses three small stripes. What is the largest three-digit number that you can make if you use twenty stripes?
In the parking lot 2
There were 12 cars in the parking lot - 5 green, 4 blue, and 3 red. What is the probability that the last car left in the parking lot is blue or green?
Permutations
How many 4-digit numbers can be composed of numbers 1,2,3,4,5,6,7 if: a, the digits must not be repeated in the number b, the number should be divisible by five, and the numbers must not be repeated c, digits can be repeated
Dices throws
What is the probability that the two throws of the dice: a) Six falls even once b) Six will fall at least once
Mr. Product
The product of ages of all of Mr. Product's children is 1408. The age of the youngest child is equal to half the age of the oldest child. How many children does Mr. Product have, and how old are they?
Permutations 82516
From how many elements can we make 5040 permutations without repetition?
Characters 63404
How many characters can we create from two commas and four dots?
Arrangements 63384
Determine the number of arrangements of these six elements: a, a, a, b, b, c.
Determine 81783
Determine the scale of the plan if the actual length of 51m is shown on the plan by a segment of length 3cm.
Interest 81773
How much will the deposit grow at an interest rate of 10% p.d. a. for 72 days by €6?
Resistance 62104
The iron is connected to a 230 V power supply with a current of 5000 mA. Calculate the electrical resistance of the iron.
Enough 2809
Five horses will eat oat stocks in 15 days. For how many days is the supply for three horses enough?
Borrowed
Mr. Douda borrowed 200,000 SK from the bank at an annual interest rate of 15.4%. He will repay the loan after four years. How many korunas will he have to repay?
Three dice 2
What is the probability that two odd numbers will be the same when three dice are rolled?
Numbers 6D
Find out how many natural six-digit numbers exist whose digit sum is four.

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