Question
Rakesh can complete a work in 'X + 12' days. While
Shikha can complete the same work in 'X + 27' days. If they can complete the work together in 'X' days, then what is the value of 'X + 27'?Solution
1/(X + 12) + 1/(X + 27) = 1/X (X + 27 + X + 12)/(X + 12)(X + 27) = 1/XX × (2X + 39) = (X + 12)(X + 27) 2X2 + 39X = X2 + 39X + 324 X2 = 324 X = 18 X + 27 = 18 + 27 = 45
Which signs should be interchanged to make the given equation correct.
45 ÷ 5/3 + 10 × 2/5 - 5 = 95
Which two signs should be interchanged to make the given equation correct?
225 + 5 × 3 ÷ 5 – 7 = 133
Select the correct combination of mathematical signs to sequentially replace the signs, to balance the following equation.
(12*7*6)* 13 *6
Select the correct combination of mathematical signs from the options given to replace # signs and get a balanced equation. 24 #8 #4 # 10 # 2
A cube is made by following the given sheet. In the cube so formed, What would be the symbol on the opposite side of the # Symbol?
Which of the following is correct?
If 'P' denote '÷', 'θ' denotes 'x', 'R' denotes '+' and 'S' denotes '-', what is the value of ' 18 θ 12 P 4 R 5 S 6 '.
Which one of the following is correct?
28 * 7 * 8 * 10
The given equation has been solved on the basis of a certain rule. Find the correct answer for the unsolved equation on that basis.
If p × ...
