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Number Systems ( 6 to 10 ):
Aptitude Questions (Number Systems):
6. 6589 – ? = 3434
A) 3242
B) 3155
C) 1123
D) 11023
E) None of these
View Answer
Answer: option (B)
Explanation:
Let 6589 – x = 3434
Then, x = 6589 – 3434 = 3155
7. 3251 + 587 + 369 – ? = 3007
A) 1350
B) 1300
C) 1275
D) 1200
E) None of these
View Answer
Answer: option (D)
Explanation:
- 3251 + 587 + 369 = 4207
- Let 4207 – x = 3007
- Then, x = 4207 – 3007 = 1200
8.Which of the following is a prime number?
A) 33
B) 81
C) 93
D) 97
E) None of these
View Answer
Answer: option (D)
Explanation:
97 are not divisible by any of the prime number 2, 3, 5, 7, 11. Therefore, 97 is a prime number.
9. Which one of the following cannot be the square of a natural number?
A) 40976
B) 55625
C) 38561
D) 143642
E) None of these
View Answer
Answer: option (D)
Explanation:
The square of a natural number never ends in 2, 3, 7 or 8.
∴ 143642 is not the square of a natural number.
10. What smallest number should be added to 4456 so that the sum is completely divisible by 6?
A) 7
B) 2
C) 3
D) 4
E) None of these
View Answer
Answer: option (B)
Explanation:
Required Number = 6 – 4 = 2