COMPUTER APTITUDE QUESTIONS : hex/Octal to Decimal Form : Set 8

Dear bankersdaily aspirant,

Computer aptitude is one of the easiest scoring part in IBPS PO Mains 2017 examination. To Score good marks in computer aptitude, you need to have a good practice on the topic. So use this set for your Practice.

D.1-5): Convert the following hexadecimal numbers to decimal form.

Q.1) 258₁₆

(a) 605

(b) 615

(c) 590

(d) 610

(e) 600

Solution:

e

= 2×16² + 5×16¹+ 8×16⁰

= 512 + 80 + 8

= 600

Q.2)2AC₁₆

(a) 684

(b) 672

(c) 690

(d) 686

(e) 668

Solution:

a

= (2×256) + (10×16) + (12×1)

= 512 + 160 + 12

= 684

Q.3) AC₁₆

(a)150

(b) 160

(c) 170

(d) 155

(e) 172

Solution:

e

= 160 + 12 = 172

Q.4) B4₁₆

(a) 182

(b) 176

(c) 180

(d) 176

(e) 186

Solution:

c

= 176 + 4 = 180

Q.5) FFA₁₆

(a) 4430

(b) 4090

(c) 4130

(d) 4250

(e) 4290

Solution:

b

= (15×256) + (15×16) + (10×1)

= 3840 + 240 + 10

= 4090

D.6-10): Convert the following octal numbers to decimal form.

Q.6) 234₈

(a) 152

(b) 146

(c) 158

(d) 156

(e) 162

Solution:

d

= 2 × 64 + 24 + 4

= 128 + 24 + 4

= 156

Q.7) 124₈

(a) 86

(b) 84

(c) 80

(d) 74

(e) 76

Solution:

b

= 64 + 16 + 4

= 84

Q.8) 237₈

(a) 153

(b) 149

(c) 154

(d) 159

(e) 168

Solution:

d

= (2 × 8²) + (3 × 8¹) + (7 × 8⁰)

= 128 + 24 + 7

= 159

Q.9) 340₈

(a) 224

(b) 284

(c) 216

(d) 218

(e) 228

Solution:

a

= (3 × 64) + (4 × 8) + 0

= 192 + 32 + 0

= 224

Q.10) 508

(a) 318

(b) 326

(c) 334

(d) 328

(e) 320

Solution:

d

= (64 × 5) + 0 + (8 × 1)

= 320 + 8 = 328

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