BKSB Numeracy Skills 1 — Questions and Answers
Question 1: What is the value of 7 × 8?
- 48
- 54
- 56 (Correct answer)
- 64
Correct answer: 56
The value of 7 multiplied by 8 is 56. This is a fundamental multiplication fact that can be found by repeatedly adding 7 eight times (7+7+7+7+7+7+7+7) or 8 seven times (8+8+8+8+8+8+8). Mastering basic multiplication tables is essential for more complex mathematical calculations.
Question 2: What is the square root of 81?
- 7
- 8
- 9 (Correct answer)
- 10
Correct answer: 9
The square root of 81 is 9. A square root is a number that, when multiplied by itself, yields the original number. In this case, 9 multiplied by 9 (9 × 9) equals 81, confirming that 9 is its square root. Understanding square roots is a basic concept in mathematics.
Question 3: A recipe calls for 3 cups of flour. If you want to make half the recipe, how much flour do you need?
- 1 cup
- 1.5 cups (Correct answer)
- 2 cups
- 3 cups
Correct answer: 1.5 cups
To make half the recipe, you need to divide the original amount of each ingredient by two. If the recipe calls for 3 cups of flour, half of that amount is 3 ÷ 2, which equals 1.5 cups. This demonstrates basic division and understanding of fractions or decimals in a practical context.
Question 4: What is the result of 25% of 200?
- 25
- 50 (Correct answer)
- 75
- 100
Correct answer: 50
To find 25% of 200, you can convert the percentage to a decimal (0.25) and multiply it by the number (0.25 × 200). Alternatively, recognize that 25% is equivalent to one-quarter (1/4), so you can divide 200 by 4. Both methods correctly yield the result of 50.
Question 5: What is the value of 2^3 (2 raised to the power of 3)?
- 6
- 8 (Correct answer)
- 9
- 12
Correct answer: 8
2^3 means 2 raised to the power of 3, which indicates that the base number (2) should be multiplied by itself three times. So, 2 × 2 × 2 equals 4 × 2, which results in 8. This is a fundamental concept of exponents, representing repeated multiplication.
Question 6: If a train travels 60 miles in 1.5 hours, what is its average speed?
- 30 mph
- 40 mph (Correct answer)
- 50 mph
- 60 mph
Correct answer: 40 mph
Average speed is calculated by dividing the total distance traveled by the total time taken. In this problem, the train travels 60 miles in 1.5 hours. Therefore, 60 miles ÷ 1.5 hours = 40 miles per hour (mph). This formula is a basic principle in physics and everyday calculations.
BKSB Numeracy Skills 1
What is the value of 7 × 8?