Question

we can cannot write 50 as x****​

Answer 1

Step-by-step explanation:

Rules for the first five symbols

Multiplication Rule:

When a symbol is repeated in succession, we multiply the value of the numeral by the number of times it is repeated.

A symbol cannot be repeated more than three times in succession.

For example:

II = 1 × 2 = 2

XX = 10 × 2 = 20

XXX = 10 × 3 = 30

We cannot write 40 as XXXX.

The symbol cannot be repeated more than three times.

Addition Rule:

Writing a smaller number to the right of a larger number means the numbers have to be added.

For example:

VI = 5 + 1 = 6

XI = 10 + 1 = 11

XII = 10 + 1 + 1 = 12

Subtraction Rule:

Writing a smaller number to the left of a larger number means that the smaller number has to be subtracted from the larger number. The symbol 1 can be used for subtraction from V and X only. The symbol X can be subtracted only from L and C.

For example: 

IV = 5 - 1 = 4

IX = 10 - 1 = 9

XL = 50 - 10 = 40

The symbol V cannot be repeated or subtracted.

We do not repeat V twice to get 10. We already have a symbol for 10. So VV for writing 10 is not correct.

We do not subtract 5 from any symbol. VX is not correct.