Double 5

Peter was thinking of a number. Peter doubles it and gets an answer of 8.6. What was the original number?

Correct result:

n =  4.3

Solution:

n=8.6/2=4310=4.3n=8.6/2=\dfrac{ 43 }{ 10 }=4.3

Try another example


We would be pleased if you find an error in the word problem, spelling mistakes, or inaccuracies and send it to us. Thank you!






Showing 1 comment:
#
Math student
Makes no sense

avatar









You need to know the following knowledge to solve this word math problem:

Next similar math problems:

  • Division
    division Divide by the number 0.2 is the same as multiply by what number?
  • Rounding
    periodic6 Double round number 727, first to tens, then to hundreds. (double rounding)
  • Unknown number
    iks-icon Samuel wrote unknown number. Then he had add 200000 to the number and the result multiply by three. When it calculated he was surprised, because the result would have received anyway, if write digit to the end of original number. Find unknown number.
  • Numbers division
    fractions With what number should be divided mixed number 2 3/4 to get 11/12?
  • Lcm 2
    lcm Create the smallest possible number that is divisible by numbers 5,8,9,4,3
  • Two-digit number
    numbers_1 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.
  • Unknown number 2
    num_sphere I think the number. When he reduces it four times, I'll get 11. What number am I thinking?
  • What is 13
    numbers_5 What is the number in between 50 and 55 that is divisible by 2,3,6,9?
  • Evaluate
    calculator_3 The division of numbers 18 and 6 increase by product of the numbers 156 and 0.001
  • About what
    flower_function How much and how many times is 72.1 greater than 0.00721?
  • A number
    number_line_4 A number increased by 7.9 is 8.3
  • Bricks
    bricks_truck Brick has volume 2.2 dm3. How many bricks can drive a truck with a capacity of 23 ton? The density of brick is 1.6 g/cm3.
  • Expression 8
    expr_1 Evaluate this expressions: a) 5[3 + 4(2.8 - 3)] b) 5×(8-4)÷4-2
  • David number
    numbers2_4 Jana and David train the addition of the decimal numbers so that each of them will write a single number and these two numbers then add up. The last example was 11.11. David's number had the same number of digits before the decimal point, the Jane's numbe
  • Whole numbers
    fractal_7 Pavol wrote down a number that is both rational and a whole number. What is one possible number she could have written down?
  • What is 11
    zlomky What is the quotient of Three-fifths and 1 Over 10?
  • Number
    fractions_1 Calculate the integer number which, divided by 34 gives 10 and the rest 25.