5
Q:

A number consists of 3 digits whose sum is 10. The middle digit is equal to the sum of the other two and the number will be increased by 99 if its digits are reversed. The number is :

A) 253 B) 263
C) 273 D) 283

Answer:   A) 253



Explanation:

Let the middle digit be x.

Then, 2x = 10 or x = 5. So, the number is either 253 or 352

Since the number increases on reversing the digits, so the hundred's digit is smaller than the unit's digit.

Hence, required number = 253.

Q:

The coefficient of x in(×-3y)3 is :

 

A) 3y2 B) 27y2
C) -27y2 D) -3y2
 
Answer & Explanation Answer: B) 27y2

Explanation:
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0 1154
Q:

The largest number which should replace * in the number 2365*4 to make the number divisible by 4 is:

 

A) 9 B) 2
C) 0 D) 8
 
Answer & Explanation Answer: D) 8

Explanation:
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0 1573
Q:

43÷16×2-1=?

A) 3 B) -2
C) 8 D) 15
 
Answer & Explanation Answer: D) 15

Explanation:
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0 383
Q:

If a+1a=5 then a3+a31 is:

 

A) 110 B) 10
C) 80 D) 140
 
Answer & Explanation Answer: A) 110

Explanation:
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0 1465
Q:

Sum of four consecutive odd numbers is 328. Find the largest number.

 

A) 85 B) 98
C) 79 D) 97
 
Answer & Explanation Answer: A) 85

Explanation:
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0 889
Q:

What is the smallest integer that is divisible by 3, 7 and 18?

 

A) 63 B) 252
C) 72 D) 126
 
Answer & Explanation Answer: D) 126

Explanation:
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0 1035
Q:

If the mean of the numbers 27 + x, 31 + x, 89 + x, 107 + x and 156 + x is 82.then the mean of 130 + x, 126 x, 68 + x, 50 + x 1 + x is :

 

A) 80 B) 75
C) 50 D) 70
 
Answer & Explanation Answer: B) 75

Explanation:
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0 287
Q:

Arrange the following in the decreasing order?

 

(√23 – √21), (√19 – √17), (√21 – √19)

 

A) (√23 – √21) > (√21 – √19) > (√19 – √17)   B) (√23 – √21) > (√19 – √17) > (√21 – √19)  
C) (√19 – √17) > (√21 – √19) > (√23 – √21)   D) (√21 – √19) > (√23 – √21) > (√19 – √17)
 
Answer & Explanation Answer: C) (√19 – √17) > (√21 – √19) > (√23 – √21)  

Explanation:
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0 808