Subject: Mathematics
Book: Maths Mastery
For multiplication or division, if the signs of the two numbers are the same (both positive or both negative), the result is positive. If the signs differ, the result is negative. For instance, (–4) × (–5) = 20, but (–6) × 7 = –42. This sign rule extends to divisions as well, so (–10) ÷ (–2) = 5, while 8 ÷ (–2) = –4. Proficiency in handling negatives is crucial for solving equations, interpreting credit/debit transactions, or analyzing temperature variations. Grasping these rules ensures you can manage advanced algebraic expressions without confusion.
A train 150 m long passes a pole in 15 seconds. What is its speed?
View QuestionA man rows downstream at 6 km/h and upstream at 4 km/h. What is the speed of the stream?
View QuestionIf sin(A) = 1/2 and A is acute, what is the value of A?
View QuestionWhat is the HCF of 72 and 120?
View QuestionA train 120 meters long is moving at a speed of 54 km/h. How long will it take to pass a pole?
View QuestionIf a cylinder has a radius of 7 cm and height of 10 cm, what is its volume?
View QuestionIf a = 2 and b = 3, what is the value of (a^2 + b^2)?
View QuestionIf x² - 9x + 18 = 0, what are the roots of the equation?
View QuestionIf x + y = 10 and xy = 21, what is the value of x³ + y³?
View QuestionA man invests Rs. 5000 at 5% per annum simple interest. What is the total amount after 3 years?
View Question