# Quantitative Aptitude: Simplification Questions Set 20

Directions: What value should come in place of the x in the following questions?

1. (√5 – √10)2 + (√2 + 5)2 = x3 – 22
A) 3
B) 5
C) 8
D) 7
E) 4
Option E
Solution:
(√5 – √10)2 = √52 + √102 – 2*√5*√10 = 5 + 10 – 2*√5*√2*√5 = 15 – 10√2
(√2 + 5)2 = 2 + 25 + 10√2
So 15 – 10√2  + 27 + 10√2  = x3 – 22
15+27+22 = x3
2. 55% of √2116 ÷ 0.01 = x × 20
A) 124.5
B) 126.5
C) 132.5
D) 133.5
E) 139.5
Option B
Solution:
55/100 * 46/0.01 = 20x
55 * 46 = 20x
3. √(122 × 16 ÷ 24 + 193 + 7 × 5) = x2
A) 3√2
B) 2√2
C) 4√2
D) 5√2
E) None of these
Option A
Solution:
12*12*16/24 = 96
193 + 7 × 5 = 193 + 35 = 228
√(96+228) = x2
18 = x2
4. √31.36 ÷ √0.64 × 252 = x2 × 36
A) 11
B) -8
C) 49
D) 81
E) -7
Option E
Solution:
5.6/0.8 * 252 = x× 36
x2  = 49
5. (1.69)4 ÷ (2197 ÷ 1000)3 × (0.13 × 10)3 = (1.3)x-2
A) 2

B) 5
C) 3
D) 4
E) 0
Option D
Solution:
(1.69)4  = (1.3)8
(2.197)3 = (1.3)9
(1.3)8 / (1.3)9 * (1.3)3 = (1.3)2
(1.3)2 = (1.3)x-2
2 = x-2, so x = 4

Directions: What approximate value should come in place of the x in the following questions? (You are expected to do approximations)

1. 68% of 1288 + 26% of 734 – 215 = x
A) 820
B) 850
C) 735
D) 825
E) 780
Option B
Solution:
68% of 1288 + 26% of 734 – 215 = x
875.84 + 190.84 – 215 = 852
2. (32.05)2 – (18.9)2 – (11.9)2 = x
A) 545
B) 615
C) 690
D) 665
E) 530
Option E
Solution:
1027 – 357 – 144 = 526
3. 6578 ÷ 67 × 15 = x × 6
A) 320
B) 250
C) 340
D) 200
E) 230
Option B
Solution:
6578*15/67*6 = 250
4. 679/45 ÷ 23/2130 × 126/169 = x
A) 1090
B) 1060
C) 1040
D) 1080
E) 1050
Option C
Solution:
680/45 * 2130/23 * 126/169  = 1043
5. √5687 × √1245 ÷ √689 = x ÷ 13
A) 1320
B) 1340
C) 1305
D) 1365
E) 1345
Option A
Solution:
74.4 * 35.2 * 13/26.2 = 1320

## 6 Thoughts to “Quantitative Aptitude: Simplification Questions Set 20”

1. Prabakar

1. RIght now, there is no idea for this section as in SBI PO Mains this year, there was no question from computer aptitude.

Here are the questions on the pattern of SBI Mains 2016, you can check these::

http://aspirantszone.com/computer-aptitude/

1. Prabakar

Thank You mod.. Please Provide Computer capsule my kind request…And your computer quizes are worthwhile….

2. ↩⬆↪EKLAVYA ↩⬆↪

mam rrb po rrb clerk me toaayegi

1. Yes.
But he was asking for computer aptitude. Not awareness.

Questions from Computer awareness will come in RRB not aptitude

1. ↩⬆↪EKLAVYA ↩⬆↪

Mam please provide daily computer quizzes