**Directions (1-5): What approximate value will come in place of the question mark (?) in the following questions?**

1. (47% of 1442 – 36% of 1412) / 63 = ?

(a) 4

(b) 5

(c) 3

(d) 1

### Show Answer

Answer : (c) 3

**Explanation :**

(c) ? = (1442 * 47 / 100 – 1412 * 36 / 100) + 63

= (677.74 – 508.32) / 63

= 169.42 / 63 = 2.69 = 3

2. (Square root of 7921 – Square root of 2070.25) * 1 / 4 = ?

(a) 11

(b) 14

(c) 15

(d) 9

### Show Answer

Answer : (a) 11

**Explanation :**

(a) ? = (square root of 7921 – square root of 2070.25) * 1 / 4

= (89 – 45.5) * 1 / 4

= 43.5 / 4 = 10.875 = 11

3. (341789 + 265108) / (8936 – 3578) = ?

(a) 150

(b) 113

(c) 135

(d) 100

### Show Answer

Answer : (b) 113

**Explanation :**

(b) ? = (341789 + 265108) / (8936 – 3578)

= 606897 / 5358 = 113.27 = 113

4. 29% of 725 = 60% of 315 + ?

(a) 28

(b) 30

(c) 15

(d) 21

### Show Answer

Answer : (d) 21

**Explanation :**

(d) 725 * 29 / 100 = 315 * 60 / 100 + ?

= 210.25 = 189 + ?

= ? = 210.25 – 189

= 21.25 = 21

5. 1595 / 25 * 36.5 = ?

(a) 2495

(b) 2329

(c) 2359

(d)2429

### Show Answer

Answer : (b) 2329

**Explanation :**

(b) ? = 1595 / 25 * 36.5

= 1595 / 25 * 36.5 = 2329

**Directions (6-10) : In each of the following questions a number series is given which has only one wrong number. You have to find out the wrong number**

6. 7.25 47.5 87.5 157.5 247.5 357.5 487.5

(a) 357.5

(b) 87.5

(c) 157.5

(d) 47.5

### Show Answer

Answer : (d) 47.5

**Explanation :**

(d) The given number series is based on the following pattern :

487.5 – 357.5 = 130

357.5 – 247.5 = 110

247.5 – 157.5 = 90

157.5 – 87.5 = 70

87.5 – 47.5 = **40**

87.5 – 37.5 = 50

37.5 – 7.5 = 30

Clearly, 47.5 is the wrong number. It should be replaced by 37.5

7. 13 16 21 27 39 52 69

(a) 21

(b) 39

(c) 27

(d) 52

### Show Answer

Answer : (c) 27

**Explanation :**

(c) The given number series is based on the following pattern :

13 + 3 = 16

16 + 5 = 21

21 + 7 = 28 # **27**

28 + 11 = 39

39 + 13 = 52

52 + 17 = 69

Clearly, 27 is the wrong number. It should be replaced by 28

8. 1500 1581 1664 1749 1833 1925 2016

(a) 1581

(b) 1664

(c) 1925

(d) 1833

### Show Answer

Answer : (d) 1833

**Explanation :**

(d) The given number series is based on the following pattern :

1500 + 81 = 1581

1581 + 83 = 1664

1664 + 85 = 1749

1749 + 87 = 1836 # **1833**

1836 + 89 = 1925

1925 + 91 = 2016

Clearly, 1833 is the wrong number. It should be replaced by 1836

9. 66 91 120 153 190 233 276

(a) 120

(b) 233

(c) 153

(d) 276

### Show Answer

Answer : (b) 233

**Explanation :**

(b) The given number series is based on the following pattern :

66 + 25 = 91

91 + 29 = 120

120 + 33 = 153

153 + 37 = 190

190 + 41 = 231 # **233**

Clearly, 233 is the wrong number. It should be replaced by 231

10. 1331 2197 3375 4914 6859 9261 12167

(a) 4914

(b) 6859

(c) 9261

(d) 2197

### Show Answer

Answer : (a) 4914

**Explanation :**

The given number series is based on the following pattern :

11 * 11 * 11 = 1331

13 * 13 * 13 = 2197

15 * 15 * 15 = 3375

17 * 17 * 17 = 4913 # **4914**

19 * 19 * 19 = 6859

Clearly, 4914 is the wrong number. It should be replaced by 4913