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- Question
- If there are 10 positive real numbers n 1 < n 2, n 3 .... < n 10 How many triplets of these numbers (n 1, n 2, n 3) (n 2, n 3, n 4), ... can be generated such that in each triplet the first number is always less than the second number and the second number is always less the third number?
Options- A. 45
- B. 90
- C. 120
- D. 180
- Correct Answer
- 120
ExplanationThree numbers can be selected and arranged out of 10 numbers in 10P3 ways 10!/7! = 10 x 9 x 8
Now, this arrangement is restricted to a given condition that first number is always less than the second number and second number is always than the third number. Thus, three numbers can be arranged among themselves in 3! ways.
Hence, required number of arrangement = (10 x 9 x 8)/(3 x 2)
= 120 ways - 1. Find the present worth of a bill of Rs. 2420 due 2 years later at 10% compound interest. Also find the true discount?
Options- A. Rs. 2000, Rs. 420
- B. Rs. 2200, Rs. 520
- C. Rs. 2100, Rs. 460
- D. None of these Discuss
- 2. In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.
Options- A. (9, 11, 14)
- B. (13, 15, 18)
- C. (17, 19, 22)
- D. (21, 23, 28) Discuss
- 3. Find the odd word/letters/numbers pair from the given alternatives.
Options- A. 41 - 72
- B. 12 - 30
- C. 51 - 42
- D. 11 - 20 Discuss
- 4. Find the odd man out. 253, 136, 352, 324, 631, 244
Options- A. 324
- B. 136
- C. 352
- D. 631 Discuss
- 5. Select the odd word from the given alternatives.
Options- A. Stream
- B. Rivulet
- C. River
- D. Valley Discuss
- 6. Select the odd word from the given alternatives.
Options- A. Chair
- B. Sofa
- C. Couch
- D. Television Discuss
- 7. Find the odd number in the following number series? 24, 4, 13, 41, 151, 640
Options- A. 4
- B. 640
- C. 41
- D. 13 Discuss
- 8. Find the odd term from the given series of numbers ? 125, 127, 130, 135, 142, 153, 165 ?
Options- A. 153
- B. 165
- C. 142
- D. 127 Discuss
- 9. What comes next in this sequence 196, 169, 144, 121, 100, 81, ?
Options- A. 77
- B. 74
- C. 67
- D. 64 Discuss
- 10. Find out the odd word/letters/number/number pair from the given alternatives.
Options- A. LJH
- B. XUS
- C. VTR
- D. FDB Discuss
More questions
Correct Answer: Rs. 2000, Rs. 420
Explanation:
Here sum is put on compound interest,
? P.W. = A / (1 + r / 100)n = 2420 / (1 + 10 / 100)2 = 2420 x 100 / 121 = Rs. 2000
? T.D. = P.W. - P
? True discount = 2420 - 2000 = Rs. 420
Correct Answer: (21, 23, 28)
Correct Answer: 41 - 72
Correct Answer: 324
Explanation:
The Sum of the digits in each number, Except 324 is 10.
Correct Answer: Valley
Correct Answer: Television
Correct Answer: 41
Explanation:
The given number series follows the pattern that,
24×0 + 4 = 4
4×1 + 9 = 13
13×2 + 16 = 42
42×3 + 25 = 151
151×4 + 36 = 640
Therefore, the odd number in the given series is 41
Correct Answer: 165
Explanation:
From the beginning, the next term comes by adding prime numbers in a sequence of 2, 3, 5, 7, 9, 11, 13... to its previous term. But 165 will not be in the series as it must be replaced by 166 since 153+13 = 166.
Correct Answer: 64
Explanation:
The given number series follows a pattern that
196, 169, 144, 121, 100, 81, ?
-27 -25 -23 -21 -19 -17
=> 81 - 17 = 64
Therefore, the series is 196, 169, 144, 121, 100, 81, 64.
Correct Answer: XUS
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