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 Numbers Questions

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Q:

Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?

 

A) 33 B) 44
C) 55 D) 66
 
Answer & Explanation Answer: C) 55

Explanation:

All such 2 digit numbers are 11,22,33,44....... upto 99

Forms an AP

So sum = n/2(a+l)

= 9/2(11+99)

Average = sum/9 = ½(11+99) = 55

 

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0 1131
Q:

A number exceeds its 1/6 by 30. What is the number?

A) 120 B) 150
C) 36 D) 24
 
Answer & Explanation Answer: C) 36

Explanation:
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0 1126
Q:

How many numbers are there from 300 to 650 which are completely divisible by both 5 and 7?

A) 8 B) 9
C) 10 D) 12
 
Answer & Explanation Answer: C) 10

Explanation:
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0 1113
Q:

What least number must be subtracted from 3401, so that the sum is completely divisible by 11?

A) 3 B) 1
C) 2 D) 0
 
Answer & Explanation Answer: C) 2

Explanation:
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0 1104
Q:

All rational numbers are ____ numbers.

A) integer B) whole
C) irrational D) real
 
Answer & Explanation Answer: D) real

Explanation:
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0 1097
Q:

Which of the following is not a Triangular number?

A) 15 B) 10
C) 5 D) 3
 
Answer & Explanation Answer: A) 15

Explanation:
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3 1085
Q:

Convert binary 10110 to decimal.

A) 22 B) 20
C) 18 D) 16
 
Answer & Explanation Answer: A) 22

Explanation:
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0 1080
Q:

The 3rd and 8th term of an arithmetic progression are -14 and 1 respectively. What is the 11th term?

A) 14 B) 16
C) 20 D) 10
 
Answer & Explanation Answer: D) 10

Explanation:
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0 1080