ELEMENTARY MATHEMATIC1
ELEMENTARY MATHEMATICS (NUMERICAL ABILITY) SERIES AND SEQUENCES
1. Find the 10th term of the A.P: 2, 7, 12,….
A. 52
B. 68
C. 47
D. None of these Ans: C
2. What will be the sum of the first 56 terms of an A.P whose 19th and 38th terms are 52 and 147 respectively?
A. 5,572
B. 5,527
C. 5,275
D. 5,725 Ans: A
3. Find the sum of the series given by S=7+11+15+19+….50 terms.
A. 5,350
B. 5,520
C. 5,250
D. 5,520 Ans: C
4. The difference of the squares of two consecutive odd integers is divisible by which of the following integers?
A. 3
B. 4
C. 6
D. 7 Ans: B
5. The number of terms of an A.P where the first term is 3, the last term is 90 and the sum is 1395:
A. 36
B. 28
C. 30
D. 29 Ans: C
NUMBER SYSTEM
6. The least number by which 20184 must be multiplied so as to make the product a perfect square is:
A. 2
B. 3
C. 5
D. 6 Ans: D
7. In a division sum, the divisor is three times the quotient and 6 times the remainder. If the remainder is 2, then the dividend is:
A. 48
B. 36
C. 50
D. 28 Ans: C
8. Divide 50 into two parts so that the sum of their reciprocals is 1/12.
A. 35, 15
B. 20, 30
C. 24,36
D. 28,22
Ans: B
9. On a particular day, sweets were to be equally distributed among 495 students of a school. However on that particular day 396 students from a nearby school also joined them. Hence each student present on that day got four sweets less. How many sweets were distributed?
A. 5445
B. 4950
C. 4455
D. 3960 Ans: C
10. The sum of three consecutive odd numbers is 1383. What is the largest number?
A. 463
B. 459
C. 457
D. 461 Ans: A
11. If the product of two numbers is 3456 and their HCF is 12, how many pairs of such numbers are possible?
A. 4
B. 3
C. 2
D. None of these Ans: C
12. The traffic lights at three different road-crossings, change after every 24 sec, 72 sec and 120 sec respectively. If they all change simultaneously at 10:54:00 hr, then at what time will
1. Find the 10th term of the A.P: 2, 7, 12,….
A. 52
B. 68
C. 47
D. None of these Ans: C
2. What will be the sum of the first 56 terms of an A.P whose 19th and 38th terms are 52 and 147 respectively?
A. 5,572
B. 5,527
C. 5,275
D. 5,725 Ans: A
3. Find the sum of the series given by S=7+11+15+19+….50 terms.
A. 5,350
B. 5,520
C. 5,250
D. 5,520 Ans: C
4. The difference of the squares of two consecutive odd integers is divisible by which of the following integers?
A. 3
B. 4
C. 6
D. 7 Ans: B
5. The number of terms of an A.P where the first term is 3, the last term is 90 and the sum is 1395:
A. 36
B. 28
C. 30
D. 29 Ans: C
NUMBER SYSTEM
6. The least number by which 20184 must be multiplied so as to make the product a perfect square is:
A. 2
B. 3
C. 5
D. 6 Ans: D
7. In a division sum, the divisor is three times the quotient and 6 times the remainder. If the remainder is 2, then the dividend is:
A. 48
B. 36
C. 50
D. 28 Ans: C
8. Divide 50 into two parts so that the sum of their reciprocals is 1/12.
A. 35, 15
B. 20, 30
C. 24,36
D. 28,22
Ans: B
9. On a particular day, sweets were to be equally distributed among 495 students of a school. However on that particular day 396 students from a nearby school also joined them. Hence each student present on that day got four sweets less. How many sweets were distributed?
A. 5445
B. 4950
C. 4455
D. 3960 Ans: C
10. The sum of three consecutive odd numbers is 1383. What is the largest number?
A. 463
B. 459
C. 457
D. 461 Ans: A
11. If the product of two numbers is 3456 and their HCF is 12, how many pairs of such numbers are possible?
A. 4
B. 3
C. 2
D. None of these Ans: C
12. The traffic lights at three different road-crossings, change after every 24 sec, 72 sec and 120 sec respectively. If they all change simultaneously at 10:54:00 hr, then at what time will