BNU1501 ASS1 S2

BNU1501 Assignment 1

Question 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