Correct option is B
Stepwise Solution: Convert Each Number to DecimalWe 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
→ Base 2 to Decimal
11111.112=(1×24)+(1×23)+(1×22)+(1×21)+(1×20)+(1×2−1)+(1×2−2)
=(1×16)+(1×8)+(1×4)+(1×2)+(1×1)+(1×21)+(1×41)
=16+8+4+2+1+0.5+0.25=31.75
B. (102.3)6
→ Base 6 to Decimal
102.36=(1×62)+(0×61)+(2×60)+(3×6−1)
=(1×36)+(0×6)+(2×1)+(3×61)
=36+0+2+0.5=38.5
C. (42.5)8
→ Base 8 to Decimal
42.58=(4×81)+(2×80)+(5×8−1)
=(4×8)+(2×1)+(5×81)
=32+2+0.625=34.625
D. (32.6)16
→ Base 16 to DecimalConvert hexadecimal digits:
3 → 3, 2 → 2, 6 → 6
32.616=(3×161)+(2×160)+(6×16−1)
=(3×16)+(2×1)+(6×161)
=48+2+0.375=50.375
Step 2: Comparing All Decimal Values
Option
| Original (Base)
| Decimal Equivalent
|
A | (11111.11)2 | 31.75
|
B | (102.3)6 | 38.5
|
C | (42.5)8 | 34.625
|
D | (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
2n, where n decreases from left to right.
2. Octal to Decimal (Base 8): Multiply each digit with
8n, 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=0∑ndi⋅bi+j=1∑md−j⋅b−j