# Indian Clerk Pre 22/10/2018

**Q1. A father’s age is four times as much as the sum of the ages of his three children but 6 years hence his age will be only double the sum of their ages. Then the age of the father is (in years)**

50

60

65

55

70

Solution:

Let age of 3 children = x

Age of father = 4x

According to question,

4x+6=2(x+6×3) ⇒ x=15

∴ Father’s age

= 4 × 15

= 60 years.

Age of father = 4x

According to question,

4x+6=2(x+6×3) ⇒ x=15

∴ Father’s age

= 4 × 15

= 60 years.

**Q2. Two years ago, A was four times as old as B. 8 years hence, A’s age will exceed B’s age by 12 years. The ratio of the present ages of A to B is**

5:3

3:2

2:1

3:1

1:3

**Q3. Everybody in a room shakes hands with every else. If total number of hand-shaken is 66, then number of persons in the room is**

11

12

13

14

16

**Q4. If the radius of a semicircle is increased by 20%, what will be increment in its area?**

20%

40%

44%

50%

45%

**Q5. If the price of a commodity is increased by 18% then by how much percent one should decrease his consumption in order to keep expenditure same as previous?**

900/59%

800/59%

700/59%

600/49%

100/9%

**Directions (6-10): What approximate value should come in place of the question mark (?) in the following questions? (You are not expected to calculate the exact value.)**

**Q6. √9026 × (5.96)²=?**

3050

3780

2340

3420

3950

Solution:

? = √9026 × (5.96)²

≃ 95 × 6²

? ≃ 3420

≃ 95 × 6²

? ≃ 3420

**Q7. 4734.96 - 3454.03 - 1612.86 = ? - 1611.43**

1280

2290

1020

18150

1040

Solution:

4734.96 – 3454.03 – 1612.86 =? – 1611.43

⇒ ? ≃ 4735 – 3454 – 1613 + 1611

? ≃ 1279

? ≃ 1280

⇒ ? ≃ 4735 – 3454 – 1613 + 1611

? ≃ 1279

? ≃ 1280

**Q8.**

27

9

4

16

21

**Q9. 133.008 × 2.97 - 111.87 + 74.13 = ?**

311

234

360

290

399

Solution:

? ≃ 133 × 3 – 112 + 74

≃ 399 - 38 ?

≃ 361

The nearest value to 361 in the options is 360

≃ 399 - 38 ?

≃ 361

The nearest value to 361 in the options is 360

**Q10. 32.1 × 2799 ÷ 549 + 120 = ?**

220

280

375

505

190

**Directions (11-15): What will come in place of question mark (?) in the following no. series?**

**Q11. 3, 5, 8, 12, 17, ?, 30**

25

27

22

24

23

**Q12. 1, 8, 27, 64, ?, 216, 343**

145

160

125

180

140

Solution:

Pattern is

1³, 2³, 3³, 4³, 5³, 6³

∴ ? = 125

1³, 2³, 3³, 4³, 5³, 6³

∴ ? = 125

**Q13. 18, 21, 16, 23, 14, ?**

25

8

14

10

12

**Q14. 0.4, 2.4, ?, 27.4, 114.6, 579**

6.4

4.2

8.3

7.8

6.8

Solution:

The pattern is

×1+2, ×2+3, ×3+4, ×4+5, ×5+6 ………

∴ ? = 2.4×2+3 = 7.8

×1+2, ×2+3, ×3+4, ×4+5, ×5+6 ………

∴ ? = 2.4×2+3 = 7.8

**Q15. 4.5, 7, 18, ?, 335, 2004**

76

64

72

63

68

Solution:

Pattern is

×2 – 2, ×3 – 3, ×4 – 4, ……..

∴ ? = 18 × 4 – 4 = 68

×2 – 2, ×3 – 3, ×4 – 4, ……..

∴ ? = 18 × 4 – 4 = 68

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