Simple Equations Test

Result

Simple Equations Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

If "a" and "b" are two negative numbers, then the value of "ab" will be ___________.

A
0

B
1

C
a positive number

D
a negative number

Solution

If a and b are two negative numbers, then the value of ab will be a positive number.

Example:

Take a = -3 and b = -5,

Now, ab = (-3) (-5)

= 15

Which is a positive number.

Hence, option C is correct.
Question 2
1 / -0

For what value of y, (y + 9) and (2y + 4) become equal?

A
2

B
3

C
4

D
5

Solution

We need to find the value of y for which (y+9) and (2y+4) become equal.

⇒ y + 9 = 2y + 4

⇒ 9 – 4 = 2y – y

⇒ 5 = y

Check:

Now at y = 5,

(y + 9) = 14

And,

(2y + 4) = 2(5) + 4

= 10 + 4

= 14

Hence, option D is correct.
Question 3
1 / -0

If k + 5= 9, then what is the value of 2k + 1?

A
4

B
5

C
7

D
9

Solution

Consider k + 5= 9,

k + 5- 5 = 9 -5

⇒ k = 4

Now, put the value of k in 2k + 1 to get,

2k + 1 = 2(4) + 1

= 8 + 1

= 9

Hence, option D is correct.
Question 4
1 / -0

Which of the following numbers cannot divide any number?

A
0

B
1

C
2

D
100

Solution

We cannot divide any number by 0, as the value will be undefined.

Consider a situation “5 mangoes are divided among 0 people” which makes no sense as number of people cannot be 0. Similarly, there are no objects which can be counted as 0.

Hence, option A is correct.