Question
Two trains, A and B, start from the same point at the
same time and travel in opposite directions. Train A travels at a speed of 60 km/h and Train B travels at a speed of 80 km/h. After how many hours will they be 420 km apart?Solution
ATQ, Relative speed = 60 km/h + 80 km/h = 140 km/h Time = Distance / Relative speed Time = 420 km / 140 km/h = 3 hours
What will come in the place of [?] in the following equation if '÷' and ' X ' are interchanged?
20 - 6 ÷ 15 X 5 + 9 - 8 = ?
In an imaginary mathematical system, symbol '–' stands for addition, symbol '+' stands for division, symbol '×' stands for subtraction, and symbol '�...
If 34 – 28 means 952, 544 + 8 means 68, 20 ÷ 5 means 25, 20 x 10 means 10, then 375 – 11 x 270 ÷ 550 + 11 x 35 = ?
Select the correct combination of mathematical signs that can sequentially replace the “@” sign and balance the following equation.
14@6@8@3@...
Which of the following interchange of sign would make the given equation correct?
45 × 9 + 5 ÷ 4 = 25
If '+' means 'division', '-' means 'multiplication', '÷' means 'addition' and ' X ' means 'subtraction', then what is the value of the following expres...
If '+' means ' - ', ' X ' means '+', ' - ' means '÷' and '÷' means ' X ', then what is the value of the following expression?
32 ÷ 8 X 117 - 1...
By interchanging which two signs the question will be correct?
15 + 5 ÷ 2 – 9 × 3 = 22
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 = ?
4 – 10 × 5 + 9 ÷ 3 = 51
