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66.
(51 + 52 + 53 + ..... + 100) is equal to :
- A.2525
- C.3225
- B.2975
- D.3775
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| (51 + 52 + 53 + ........... + 100) | ||||||||||||
| = (1 + 2 + + 3 + ..... + 100) - (1 + 2 + 3 + ........... + 50) | ||||||||||||
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67.
What least value must be assigned to * so that the number 63576*2 is divisible by 8?
- A.1
- C.3
- B.2
- D.4
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The given number is divisible by 8, If the number 6x2 is divisible by 8. |
| Clearly, the least value of x is 3. |
68.
The digit in the unit's place of the number represented by (795 – 358) is:
- A.0
- C.6
- B.4
- D.7
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Unit digit in 74 is 1. So, unit digit in 792 is 1. | ||||||||
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69.
18265 + 2736 + 41328 = ?
- A.61329
- C.62319
- B.62239
- D.62329
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| 18265 + 2736 + 41328 = 62329 |
70.
If we write all the whole numbers from 200 to 400, then how many of these contain the digit 7 once and only once?
- A.32
- C.35
- B.34
- D.36
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Required numbers from 200 to 300 are 207, 217, 227, 237, 247, 257, 267, 270, 271, 272, 273, 274, 275, 276, 278, 279, 287, 297. Their number is 18. | |||
| Similarly, such numbers between 300 and 400 are also 18 in number. | |||
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