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BNU1501 Assignment 1Question 1
Every rational number is a:
[1] Whole number
[2] Real number
[3] Natural number
[4] None of the above
Answer: [2] Real number
Explanation: A rational number is any number that can be expressed as a fraction p/q, where p and q are
integers and q is not equal to zero. Real numbers include rational numbers, as well as irrational numbers
like √2 and π.
Question 2
Round off 20.85784 to:
a) Four decimal places
b) The nearest whole number (integer)
Answer: [2] a) 20.8578 b) 21
Explanation:
a) Rounding to four decimal places: 20.85784 rounded to four decimal places is 20.8578.
b) Rounding to the nearest whole number: 20.85784 is closer to 21 than 20, so when rounded to the
nearest whole number, it becomes 21.
Question 3
Round 312.92 to the nearest whole number.
Answer: [1] 313
, Explanation: Rounding 312.92 to the nearest whole number results in 313 because 0.92 is closer to 1
than 0.
Question 4
Which one of these numbers rounds to 100,000?
Answer: [1]
Explanation: Rounding 99,999 to the nearest hundred thousand results in 100,000, as it is closer to
100,000 than to any other hundred thousand value.
Question 5
Negative nine decreased by 3 times a number.
Answer: [4] −9 – 3𝑥
Explanation: The expression “Negative nine decreased by 3 times a number” can be represented as “-9 –
3x” or “-9 – 3𝑥.”
Question 6
What is the definition of a constant?
Answer: [3] The number with no variable
Explanation: In mathematics, a constant is a fixed value that does not change and does not depend on
any variables. It is represented by a numerical value.
Question 7
What is the definition of a coefficient?
Answer: [2] The number in front of a variable
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