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61.
A six-digit number is formed by repeating a three-digit number; for example, 256256 or 678678 etc. Any number of this form is always exactly divisible by :
- A.7 only
- C.13 only
- B.11 only
- D.1001
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| 256256 = 256 x 1001; 678678 = 678 x 1001, etc. |
| So, any number of this form is divisible by 1001 |
62.
When a number is divided by 31, the remainder is 29. When the same number is divided by 16, What will be the remainder?
- A.11
- C.15
- B.13
- D.Data inadequate
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Number = (31 x Q) + 29. Given data is inadequate. |
63.
The number of digits of the smallest number, which when multiplied by 7 gives the result consisting entirely of nines, is:
- A.3
- C.6
- B.5
- D.8
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| By hit and trial, we find that a number exactly divisible by 7 and consisting entirely of nines is 999999. Number of digits in it = 6. |
64.
7845 -? = 8461 – 3569
- A.2593
- C.3569
- B.2773
- D.None of these
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Let 7845 - x = 8461 - 3569 |
| Then, 7845 - x = 4892 |
| x = (7845 - 4892) = 2953 |
65.
The unit's digit in the product (3127)173 is:
- A.1
- C.7
- B.3
- D.9
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Unit digit in (3127)173 - Unit digit in (7)173. Now, 74 gives unit digit 1 | |||||
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