A boat goes 5 km an hour in still water, but takes twice as much time in going the same distance against the current. The speed of the current (in km/hour) is :
Let the speed of the current be x kmph. According to the question, 5/(5 – x) = 2 ⇒ 10 – 2x = 5 ⇒ 2x = 10 – 5 ⇒ x = 5/2 = 2.5 km/hr
If × stands for 'addition', ÷ stands for 'subtraction', + stands for 'multiplication' and - stands for 'division', then 31 × 18 ÷ 20 - 5 + ...
Which two signs should be interchanged to make the following equation correct?
48 – 114 ÷ 3 + 6 × 7 = 44
If ‘P’ means (÷), ‘Q’ means (×), ‘R’ means (+), and ‘S’ means (-), then what is the value of the expression: 840 P 14 R 32 Q 8 S 99 R...
Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
168 * 8 * 7 * 34 * 94 = 256
Which two signs need to be interchanged to make the following equation correct?
75 – 18 × 80 ÷ 16 + 40 = 125
Which signs should be interchanged to make the given equation correct.
51 ÷ 3 + 17 x 14 - 2 = 6
Which sequence of mathematical symbols among given sequences must be inserted in place of the (?) in order to obtain the desired result?
(250 ? 7...
Which two signs should be interchanged to make the following equation correct?
7 × 6 ÷ 3 – 6 = 40 + 20
After interchanging "×" and "÷", "7" and "4", which of the following equations becomes correct?
If “ A ” denotes “added to”, “ B ” denotes “divided by”, “ C ” denotes “multiplied by” and “ D ” denotes “subtracted from...
