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 Numbers Questions

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Q:

Find the missing number?

A) 216 B) 1024
C) 1296 D) 2024
 
Answer & Explanation Answer: C) 1296

Explanation:
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1 767
Q:

Product of three consecutive odd numbers is 1287. What is the largest of the three numbers?

A) 9 B) 11
C) 13 D) 17
 
Answer & Explanation Answer: C) 13

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1 936
Q:

For what value of X, 211X will be a perfect square?

A) 4 B) 5
C) 6 D) 9
 
Answer & Explanation Answer: C) 6

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1 903
Q:

A prime number contains the digit X at unit’s place. How many such digits of X are possible?

A) 3 B) 4
C) 5 D) 6
 
Answer & Explanation Answer: D) 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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1 1742
Q:

Consider the following statements in respect of two integers p and q (both > 1) which are relatively prime:

1) Both p and q may be prime numbers.

2) Both p and q may be composite numbers

3) one of p and q may be prime and the other composite.

Which of the above statements are correct?

 

 

A) 1 and 2 only B) 2 and 3 only
C) 1 and 3 only D) 1, 2 and 3
 
Answer & Explanation Answer: D) 1, 2 and 3

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1 859
Q:

What is 0.53 + 0.53equal to ?

A) 1.068 B) 1.072
C) 1.082 D) 1.096
 
Answer & Explanation Answer: A) 1.068

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1 880
Q:

What is the quotient when 1359 is divided by 48?

A) 29 B) 31
C) 30 D) 28
 
Answer & Explanation Answer: D) 28

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1 805
Q:

What least number must be subtracted from 518, so that the sum is completely divisible by 13?

A) 11 B) 10
C) 9 D) 12
 
Answer & Explanation Answer: A) 11

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