Question

Which equation is NOT true?

Answer 1

Hi!

I can help you with joy! :)

• Here, we need to determine if each equation is true by simplifying fractions.

• The 1st equation states that

10/12 = 5/6

Is it true?

Let’s simplify 10/12 to find out.

Divide 10 and 12 by 2:

5/6

Thus. The 1st equation is true.

How about the next one?

We have 3 options left.

69/100=6/10

Is that correct?

Nope!

Why?

If we simplify 69/100, we will not get 6/10.

In fact, 69/100 cannot be simplified.

Thus, the second equation is not true.

Now, how about Options C and D?

Well, both of these equations ARE true.

Thus, the second equation is not true.

Hope it helps.

Do ask if you have any query.

~Silent~

Answer 2

B

Explanation:

Using the method of cross- multiplication

`(a)/(b)` =
`(c)/(d)` ⇒ ad = bc

If ad ≠ bc then equation is not true

A

`(10)/(12)` =
`(5)/(6)` , then

10 × 6 = 12 × 5 = 60 ← equation is true

B

`(69)/(100)` =
`(6)/(10)` , then

69 × 10 = 690 and 100 × 6 = 600

690 ≠ 600 ← equation not true

C

`(10)/(5)` =
`(200)/(100)` , then

10 × 100 = 5 × 200 = 1000 ← equation is true

D

`(12)/(4)` =
`(6)/(2)` , then

12 × 2 = 4 × 6 = 24 ← equation is true