Question
The speed of a boat in still water is 7 km/hr and speed
of current is 4 km/hr. If time taken to cover a certain distance upstream is 22 hours, then how long will the boat take to cover the same distance downstream?Solution
Total distance = 22 × (7 – 4) = 66 km Required time = 66/(7 + 4) = 6 hrs
Select the correct combination of mathematical signs that can sequentially replace ‘*’ sign and balance the equation given below.
82 * 28 * 7...
If x stands for ‘addition’, ÷ stands for ‘subtraction’, + stands for ‘multiplication’, and – stands for ‘division’, then 80 x 54 –...
If '+' means '-', ' X ' means '+', '-' means '÷' and '÷' means ' X ', then what is the value of the following expression?
912 - 8 + 211 X 14 ÷...
Select the correct combination of mathematical signs to replace the * signs and balance the given equation.
5 * 15 * 320 * 2 * 45 = 190
If 236 = 33, 487 = 57, 6391 = 57, then 851 = ?
Select the correct combination of mathematical signs to replace the '@' signs and balance the given equation.
22 @ 6 @ 18 @ 17 @ 2
- Which two signs are to be interchanged to make the given equation correct?
132 + 14 ÷ 11 - 84 X 72 = 156 Select the correct combination of mathematical signs that can sequentially replace ‘*’ sign and balance the equation given below.
42 * 18 ...
If ‘÷’ means ‘addition’, ‘+’ means ‘subtraction’, ‘-’ means ‘multiplication’, and ‘x’ means ‘division’, what will be th...
Which two digits and signs can be interchanged so as to balance the given equation?
406- 102 + 128 X 5 ÷ 58 = 545
