Question

15. Question 10.
If 9 * 11 =XVIII, 7* 9 = IX and 17 * 12 = VIII, then what is the value of 5 * 7 = ?​

Answer 1

Answer:

VIII

Step-by-step explanation:

9* 11 = 99 (9+9=18) = XVIII

7* 9 = 63 (6+3=9) = IX

5* 7=35 (3+5=8) = VIII

Answer 2

5 * 7 = XLV.

To Find:

• The value of 5 * 7

Given:

• The values of 9 * 11 = XVIII, 7 * 9 = IX and 17 * 12 = VIII

Solution:

If 9 * 11 = XVIII, then 9 = XVIII / 11.

And, if 7 * 9 = IX, then 9 = IX / 7.

Therefore, XVIII / 11 = IX / 7. Solving for XVIII, we get:

XVIII = IX * 11 / 7

Since we know that IX = 7 * 9, then:

XVIII = 7 * 9 * 11 / 7 = 63.

So, 5 * 7 = 5 * 7 * 9 / 9 = 5 * 9 = 45 = XLV.

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