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Question
Which of the following can't be the unit's digit of a perfect square?
Options
A. 4
B. 6
C. 8
D. 9
Correct Answer
8
Tags:
Bank Exams
Numbers problems
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1. By what least number should 1200 be multiplied so that it becomes a perfect square?
Options
A. 2
B. 3
C. 4
D. 5
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Correct Answer: 3
2. Which smallest number must be subtracted from 400, so that the resulting number is completely divisible by 7?
Options
A. 6
B. 1
C. 2
D. 4
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Correct Answer: 1
3. The sum of three consecutive even integers is 84. Which is the least integer among them?
Options
A. 28
B. 30
C. 32
D. 26
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Correct Answer: 26
4. A number exceeds its 1/6 by 30. What is the number?
Options
A. 120
B. 150
C. 36
D. 24
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Correct Answer: 36
5. What is the digit in unit's place of the product 51 x 52 x 53 ...... 59?
Options
A. 0
B. 4
C. 3
D. 6
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Correct Answer: 0
6. How many numbers are there from 300 to 700 which are divisible by 2, 3 and 7?
Options
A. 7
B. 8
C. 9
D. 10
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Correct Answer: 9
7. Product of three consecutive odd numbers is 1287. What is the largest of the three numbers?
Options
A. 9
B. 11
C. 13
D. 17
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Correct Answer: 13
8. For what value of X, 211X will be a perfect square?
Options
A. 4
B. 5
C. 6
D. 9
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Correct Answer: 6
9. The number 3521 is divided by 8. What is the remainder?
Options
A. 1
B. 3
C. 7
D. 9
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Correct Answer: 3
10. A prime number contains the digit X at unit?s place. How many such digits of X are possible?
Options
A. 3
B. 4
C. 5
D. 6
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Correct Answer: 6
Explanation:
For prime no units place cannot be occupied by even number except for 2
Thus no of digits occupying unit digit of prime numbers = 6 (1,2,3,5,7,9)
Example 2,3,5,7,11,19 in itself are prime numbers
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