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If (L)ₘ represents a number L in base-M number system, then identify the correct ascending order of the following numbers A-D when converted to decima
Question

If (L)ₘ represents a number L in base-M number system, then identify the correct ascending order of the following numbers A-D when converted to decimal number system:

A. (11111.11)₂
B. (102.3)₆
C. (42.5)₈
D. (32.6)₁₆
Choose the correct answer from the options given below:

A.

B, A, C, D

B.

A, C, B, D

C.

C, A, D, B

D.

D, C, B, A

Correct option is B

Stepwise Solution: Convert Each Number to Decimal
We are given four numbers in different bases. We need to convert each to decimal and then arrange them in ascending order.
A. (11111.11)2\bf{(11111.11)_2}→ Base 2 to Decimal
11111.112=(1×24)+(1×23)+(1×22)+(1×21)+(1×20)+(1×21)+(1×22)11111.11_2 = (1 \times 2^4) + (1 \times 2^3) + (1 \times 2^2) + (1 \times 2^1) + (1 \times 2^0) + (1 \times 2^{-1}) + (1 \times 2^{-2})​​
=(1×16)+(1×8)+(1×4)+(1×2)+(1×1)+(1×12)+(1×14)= (1×16) + (1×8) + (1×4) + (1×2) + (1×1) + (1×\frac{1}{2}) + (1×\frac{1}{4})​​
=16+8+4+2+1+0.5+0.25=31.75= 16 + 8 + 4 + 2 + 1 + 0.5 + 0.25 = 31.75​​
B. (102.3)6\bf{(102.3)_6}→ Base 6 to Decimal
102.36=(1×62)+(0×61)+(2×60)+(3×61)102.3_6 = (1 \times 6^2) + (0 \times 6^1) + (2 \times 6^0) + (3 \times 6^{-1})​​
=(1×36)+(0×6)+(2×1)+(3×16)= (1×36) + (0×6) + (2×1) + (3×\frac{1}{6})​​
=36+0+2+0.5=38.5= 36 + 0 + 2 + 0.5 = 38.5​​
C. (42.5)8\bf{(42.5)_8}→ Base 8 to Decimal
42.58=(4×81)+(2×80)+(5×81)42.5_8 = (4 \times 8^1) + (2 \times 8^0) + (5 \times 8^{-1})​​
=(4×8)+(2×1)+(5×18)= (4×8) + (2×1) + (5×\frac{1}{8})​​
=32+2+0.625=34.625= 32 + 2 + 0.625 = 34.625​​
D. (32.6)16\bf{(32.6)_{16}}→ Base 16 to Decimal
Convert hexadecimal digits:
3 → 3, 2 → 2, 6 → 6
32.616=(3×161)+(2×160)+(6×161)32.6_{16} = (3 \times 16^1) + (2 \times 16^0) + (6 \times 16^{-1})​​
=(3×16)+(2×1)+(6×116)= (3×16) + (2×1) + (6×\frac{1}{16})​​
=48+2+0.375=50.375= 48 + 2 + 0.375 = 50.375​​
Step 2: Comparing All Decimal Values
Option
 Original (Base)
Decimal Equivalent
A
(11111.11)2(11111.11)_2​​
31.75
B
(102.3)6(102.3)_6​​
38.5
C
(42.5)8(42.5)_8​​
34.625
D
(32.6)16(32.6)_{16}​​
50.375
Ascending Order of Values:
31.75 (A) < 34.625 (C) < 38.5 (B) < 50.375 (D)
Arranging them in ascending order results in the sequence: A < C < B < D.
Information Booster:
1. Binary to Decimal (Base 2):
Multiply each bit with 2n2^n​, where n decreases from left to right.
2. Octal to Decimal (Base 8): Multiply each digit with 8n8^n​, same logic as base-10 but with 8 as base.
3. Hexadecimal to Decimal (Base 16): Uses digits 0–9 and letters A–F (A=10, B=11,…F=15).
4. Positional Notation: Any number in base b is converted to decimal using the formula:
i=0ndibi+j=1mdjbj\sum_{i=0}^{n} d_i \cdot b^i + \sum_{j=1}^{m} d_{-j} \cdot b^{-j}​​​​​​

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