Question
Average of 8 numbers is 80. If average of first four and
last two numbers is 80 and 60, respectively then find the fifth number given that ratio of fifth and sixth number is 7:5, respectively.Solution
Let fifth and sixth numbers be ‘7x’ and ‘5x’, respectively. So, 7x + 5x = 80 × 8 – 60 × 7 – 50 × 5 = 300 Or, 12x = 300 Or, x = 25 So, fifth number = 25 × 7 = 175
If ‘@’ means ‘+’, ‘#’ means ‘-’, ‘$’ means ‘×’ and ‘%’ means ‘÷’, then what is the value of the following expression?<...
Select the correct combination of mathematical signs to replace the * signs and balance the given equation.
5 * 15 * 320 * 2 * 45 = 190
If '+' means '-', 'X' means '+', '-' means '÷', and '÷' means 'X', then what is the value of the following expression?
72 - 9 + 16 X 8 ÷ 4 X 1...
Kim is standing to the right of Lana and to the left of Mini. Nia is standing to the left of Lana. Onyx is in the middle. All of them are standing in a ...
Select the correct combination of mathematical signs that can sequentially replace '*' sign and balance the equation given below.
90 * 5 * 15 * 2...
Out of the total number of players, 100/3 % are in hotel X and the remaining are in hotel Y. If 20 players from hotel Y are shifted to hotel X, then the...
Select the correct sequence of mathematical signs that can sequentially replace the ‘#’ signs and balance the given equation.
56 # 8 # 4 # 32...
If '%' means (+), '#' means ( - ), '@' means ( X ), and '&' means (÷), then what is the value of the expression:
80 % 110 & 5 @ 9 # 104
If,
40 – 14 means 560,
168 + 8 means 21,
26 ÷ 2 means 28,
8 x 7 means 1,
then 410 – 7 x 290 ÷ 350 + 7 x 21 = ?
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 @ ...
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