# Expression of a variable from the formula + natural numbers - math problems

#### Number of problems found: 32

• Sum of four numbers
The sum of four consecutive natural numbers is 114. Find them.
• The sum
The sum of the squares of two immediately following natural numbers is 1201. Find these numbers.
• Sum of the seventeen numbers
The sum of the 17 different natural numbers is 154. Determine the sum of the two largest ones.
• Negative difference
Find four arithmetic progression members between 7 and -6.
• Even / odd numbers
a / Using variable n write two consecutive odd numbers. b / the sum of three consecutive odd numbers is 333. What are this numbers?
• What are
What are the four terms between 4 and 19?
• Digits
Show that if x, y, z are 3 consecutive nonzero digits, zyx-xyz = 198, where zyx and xyz are three-digit numbers created from x, y, z.
• Simple sequence
Continue with this series of numbers: 1792,448, 112, _, _
• Rectangles
The perimeter of a rectangle is 90 m. Divide it into three rectangles, the shorter side has all three rectangles the same, their longer sides are three consecutive natural numbers. What is the dimensions of each rectangle?
• AP members
What is the value of x2, x3, x4, x5…of the terms (of arithmetic progression) when x1 = 8 and x6 = 20?
• Unknown number 7
16% of the unknown number is by 21 less than unknown number itself. Determine the natural unknown number.
• 1 page
1 page is torn from the book. The sum of the page numbers of all the remaining pages is 15,000. What numbers did the pages have on the page that was torn from the book?
• Two-digit number
Digit sum of thinking two-digit natural number is 11. When it exchanging a sequence of digits, given a number which is 27 less than the thinking number. Find out which number I think.
• Alley
Alley measured a meters. At the beginning and end are planted poplar. How many we must plant poplars to get the distance between the poplars 15 meters?
• Quotient
Find quotient before the bracket - the largest divisor 51 a + 34 b + 68 121y-99z-33
• Four integers
Fnd four consecutive integers so that the product of the first two is 70 times smaller than the product of the next two.
• Library
New books were purchased for the library. Five-eighths were professional books, one-fifth were encyclopedias, and 231 books were dictionaries. How many professional books were there?
• Twenty
Twenty rabbits are put in 4 cells so that there are a different number of rabbits in each cell contains at least 3 rabbits. What is the largest possible number of rabbits in one cell?
• Rectangle diagonals
It is given a rectangle with an area of 24 cm2 a circumference of 20 cm. The length of one side is 2 cm larger than the length of the second side. Calculate the length of the diagonal. Length and width are yet expressed in natural numbers.