Question
If x ,y,z are three integers such that x +y = 8,y +z =13
and z +x =17,then the value of x2 /yz is:Solution
x + y = 8 ----(1) y + z = 13 ----(2) z + x = 17 ----(3) Eq (1) + (2) + (3), 2(x + y + z) = 8 + 13 + 17 x + y + z = 38/2 = 19 ----(4) From eq (3) and (4), x + 13 = 19 x = 6 From eq(3), z + x = 17 z + 6 = 17 z = 11 From eq(2), y + z = 13 y + 11 = 13 y = 2 x2/yz = 62 / 2×11 =36 / 22=18/11
If ‘+’ means ‘–’, ‘–’ means ‘×’, ‘×’ means ‘÷’, ‘÷’ means ‘+’, then what will come in place of the question mark...
Which two numbers should be interchanged to make the given equation correct?
620 + 75 ÷ 8 × 35 – 44 × 5 + 15 = 583
If '+' means '×', '×' means '-', '÷' means '+', and '-' means '÷', select the number from the given options that can replace the question mark '?' i...
If '#' means ' - ', '@' means '+', '$' means '÷' and '&' means ' X ', then what is the value of the following expression?
72 # 91 $ 7 & 4 @ 18
If 22 – 16 means 352, 450 + 50 means 9, 9 ÷ 3 means 12, 11 x 8 means 3, then ' 280 – 5 x 240 ÷ 450 + 9 x 26' = ?
If in a certain code language ‘+’ represents ‘×’, ‘–’ represents ‘+’, ‘×’ represents ‘÷’ and ‘÷’ represents ‘–’....
Select the correct combination of mathematical signs that can sequentially replace the ‘*’ signs and balance the given equation.
15 * 9 * 64 ...
If “+” means “minus”, “×” means “divided by”, “÷” means “plus”, and “-“ means then “multiplied by”
250 × 10 �...
Which two signs should be interchanged to make the given equation correct?
15 ÷ 6 - 10 x 5 + 11 = 99
Which of the following “signs” are placed in place of “symbols” given in the equation to make the equation true?
36 $ 12 % 6 + 8 – 9 @ ...
Relevant for Exams:
