Question
A boat has a speed of 52 km/h in still water. It takes
8 hours to travel from point B to point A downstream. The total distance between the two points is 448 km. What is the time taken by the boat to travel from point A back to point B?Solution
Let, speed of the stream = x km/h So, (52 + x) × 8 = 448 8x = 448 – 416 8x = 32 x = 4 Therefore, time taken by boat to reach point B from point A = 448/48 = 9 hours 20 minutes
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
364 * 4 * 7 * 4 * 12 = 75
If ‘÷’ means ‘-’, ‘-’ mean ‘+’, ‘+’ means ‘×’ and ‘×’ means ‘÷’, compute the value of the expression:
132 × ...
- If '+' means '-', ' X ' means '+', '-' means '÷' and '÷' means ' X ', then what is the value of the following expression?
32 ÷ 5 X 184 - 8 + 78 Which among the given operators should replace the “%” (in the same order) in the given expression below:
6 % 11 % 6 % 37 % 30 % 7
Which two signs should be interchanged to make the given equation correct?
11 – 22 + 30 × 25 ÷ 5 = 267
If "+" means "subtraction", "×" means "division", "÷" means "addition" and "–" means "multiplication", then solve 98 – 2 x 14 ÷ 5 – 7 + 40 .
Select the correct combination of the mathematical signs to replace the ‘@’ symbols in the below equation and thereby balance it:
81@9@5@30@1...
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' = ?
Select the correct combination of mathematical signs that can sequentially replace the “@” sign and balance the following equation.
12@5@7@2@...
If the signs '+' and ' ÷ 'and the numbers '2' and '4' are interchanged, which one of the following four equations would be correct?
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