Average
1. The average weight of 3 person P, Q, R is 84 kg. Another person who is S joins the group and now the present average of the group becomes 80 kg. If another person T, whose weight is 3 kg more than that of S, replaces P then the average weight of Q, R, S, and T becomes 78 kg. Find the weight of P.
A. 70 kg
B. 72 kg
C. 79 kg
D. 78 kg
Answer: Option (C)
2. Three years ago, the average of A, B, and C was 27 years and that of B and C 5 years ago was 20 years. A’s present age is
A. 35 years
B. 30 years
C. 40 years
D. 48 years
Answer: Option (C)
3. The average age of a family of 6 members is 22 years. If the age of the youngest member be 7 years, what was the average age of the family at the birth of the youngest member?
Answer: Option (C)
4. The average of ten numbers is 7. If each number is multiplied by 12, then the average of the remaining numbers will be
Answer: Option (B)
5. Average marks obtained by Raju in 3 papers is 52 and in the fourth paper, he scored 60 marks. Find the new average of marks scored by Raju.
A. 55
B. 54
C. 52
D. 53.5
Answer: Option (B)
Data Interpretation
Directions(1-5): study the following table and answer the questions given below it.
Production of sugar by six major production units of India in Million Tonnes:
1. In which month unit B has a contribution of approximately 15% in the total sugar production?
A. August
B. June
C. July
D. April
Answer: Option (C)
2. Which of the following units shows continuous increase in production of sugar over months?
Answer: Option (A)
3. In the case of Unit E, in which of the following pairs of months the production of sugar was equal?
A. April & June
B. June & July
C. July & August
D. April & May
Answer: Option (D)
4. In the month of June, how many units have a share of more than 25% of the total production of sugar?
A. one
B. Three
C. Two
D. Four
Answer: Option (A)
5. What was approximate percentage decrease in sugar production of unit B in June as compared to April?
A. 8 %
B. 10 %
C. 15 %
D. 18 %
Answer: Option (B)
Decimal and Fractions
1. When .36 is written in simplest fractions form, the sum of the numerator and the denominator is:
Answer: Option (A)
2. Which of the following fractions is the smallest?
A. 14/16
B. 15/19
C. 16/21
D. 17/23
Answer: Option (B)
3. Which of the following fractions is less than 7/8 and greater 1/3?
A. 2/4
B. 25/29
C. 9/10
D. 17/24
Answer: Option (D)
4. 337.62 + 8.591 + 34.4 = ?
A. 371.722
B. 391.622
C. 380.611
D. 463.94
Answer: Option (C)
5. 34.95 + 240.016 + 23.98 = ?
A. 298.1057
B. 298.222
C. 298.946
D. 299.09
Answer: Option (C)
HCF & LCM
1. What is the L.C.M. of 25, 30, 35 and 40 ?
A. 3800
B. 4200
C. 4400
D. 3200
E. None of these
Answer: Option (B)
2. What is the greatest number which divides 639, 1065 and 1491 exactly?
A. 193
B. 183
C. 223
D. 213
E. 233
Answer: Option (D)
3. What is the H.C.F. of 4/9, 10/21 and 20/63 ?
A. 4/189
B. 6/63
C. 2/63
D. 20/21
E. None of these
Answer: Option (C)
4. The H.C.F. of two numbers is 12 and their difference is 12. Which of the following can be the numbers?
A. 66, 77
B. 70, 84
C. 94, 108
D. 84, 96
E. 66, 106
Answer: Option (D)
5. The HCF of two numbers is 29 & their sum is 174. The possible numbers are
A. 1,174
B. 74,100
C. 29, 154
D. 29, 145
E. None of these
Answer: Option (D)
Mixtures and Allegations
1. In what ratio must a grocer mix two varieties of pulses costing Rs. 15 and Rs. 20 per kg respectively so as to get a mixture worth Rs. 16.50 per kg? [RRB 2003]
A. 3: 7
B. 5: 7
C. 7: 3
D. 7: 5
E. None of these
Answer: Option (C)
2. Find the ratio in which rice sold at Rs. 7.20 a kg must be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg. [IGNOU, 2008]
A. 1: 3
B. 2: 3
C. 3: 4
D. 4: 5
E. None of these
Answer: Option (B)
3. In what ratio must tea at Rs. 62 per kg be mixed with tea at Rs. 72 per kg so that the mixture must be worth Rs. 64.50 per kg?
A. 3 : 1
B. 3: 2
C. 4: 3
D. 5: 3
E. None of these
Answer: Option (A)
4. In what ratio must water be mixed with milk costing Rs. 12 per litre to obtain a mixture worth of Rs. 8 per litre?
A. 1: 2
B. 2: 1
C. 2: 3
D. 3: 2
E. None of these
Answer: Option (A)
5. The cost of Type I rice is Rs. 15 per kg and Type 2 rice is Rs 20 per kg. If both Type 1 and Type 2 are mixed in the ratio 2: 3, then the price per kg of the mixed variety of rice is: Rs [MBA 2002]
A. 18
B. 18.50
C. 19
D. 19.50
E. None of these
Answer: Option (A)
Number System
1. Which of the following smallest number should be added to 163429 to make it exactly by 3?
A. 2
B. 4
C. 5
D. 7
E. None of these
Answer: Option (A)
2. Find the least number of boys so that they can be arranged in the groups of 18,24 and 30.
A. 210
B. 240
C. 320
D. 360
E. None of these
Answer: Option (D)
3. Find the greatest number which divides 327, 545 and 763 exactly.
A. 107
B. 108
C. 109
D. 118
E. None of these
Answer: Option (C)
4. 2/3 of 3/7 of 6/11
of a number is 144. What is the number?
A. 620
B. 734
C. 862
D. 924
E. None of these
Answer: Option (D)
5. When 1/9 of a number is subtracted from the number itself, it gives the same value as the sum of all the angles of a quadrilateral. What is the number?
A. 205
B. 315
C. 405
D. 510
E. None of these
Answer: Option (C)
Percentages
1. If 20% of a = b, then b% of 20 is the same as:
A. 4% of a
B. 5% of a
C. 20% of a
D. None of these
Answer: Option (A)
2. In a certain school, 20% of students are below 8 years of age. The number of students above 8 years of age is 2/3 of the number of students of 8 years of age which is 48. What is the total number of students in the school?
A. 72
B. 80
C. 120
D. 150
E. 100
Answer: Option (E)
3. Two numbers A and B are such that the sum of 5% of A and 4% of B is two-third of the sum of 6% of A and 8% of B. Find the ratio of A : B.
A. 2 : 3
B. 1 : 1
C. 3 : 4
D. 4 : 3
Answer: Option (D)
4. A student multiplied a number by 3/5 instead of 5/3. What is the percentage error in the calculation?
A. 34%
B. 44%
C. 54%
D. 64%
Answer: Option (D)
5. In an election between two candidates, one got 55% of the total valid votes, 20% of the votes were invalid. If the total number of votes was 7500, the number of valid votes that the other candidate got, was:
A. 2700
B. 2900
C. 3000
D. 3100
Answer: Option (A)