Mathematics Q&A for Class 7 · Page 3
47 free answers in Mathematics for Class 7 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- MathematicsClass 7All
What is the speed of 5 km in 30 minutes?
. The speed is 10 km/h. First, convert 30 minutes to hours (30 ÷ 60 = 0.5 hours), then calculate: 5 km ÷ 0.5 hours = 10 km/h. This is approximately the speed of a brisk walk or slow jog.
- MathematicsClass 7All
What is the speed of 1.5 km in 5 minutes?
The speed is 18 km/h. Convert 5 minutes to hours (5 ÷ 60 = 0.0833 hours), then calculate: 1.5 km ÷ 0.0833 = 18 km/h. This represents a moderate running pace.
- MathematicsClass 7All
How do mean and median work?
Mean: Sum of values divided by count (average) Formula: (x₁ + x₂ + ... + x_n) / n Affected by extreme values Median: Middle value when data is ordered For odd n: Middle value For even n: Average of two middle values Not affected by extreme values Example for {1, 3, 5, 7, 100}: Mean = 116/5 = 23.2 Median = 5
- MathematicsClass 7All
What is the mean of 24 and 36?
Mean = (24 + 36) ÷ 2 = 60 ÷ 2 = 30 The mean (average) of 24 and 36 is 30.
- MathematicsClass 7All
How do you find the mean of 1, 2, 3, 4, 5?
Mean = (1 + 2 + 3 + 4 + 5) ÷ 5 Mean = 15 ÷ 5 = 3 The mean of 1, 2, 3, 4, 5 is 3.
- MathematicsClass 7All
How does the mean work?
The mean (average) is calculated by: Mean = Sum of all values ÷ Number of values Formula: μ = (x₁ + x₂ + ... + x_n) / n Steps: Add all numbers in the dataset Count how many numbers there are Divide the sum by the count The mean represents the central tendency of data.
- MathematicsClass 7All
What is this number 1000000000000000000000000
This number is called "one septillion" in American English or "one quadrillion" in British English—the difference stems from the two distinct systems used to name large numbers. In the short scale system (used in the United States and modern British English), every new word represents a thousand times the previous value, making this 24-zero number a septillion (1,000^8). In the long scale system (historically used in British English and still used in many European countries), new number