15
Q:

The sum of the squares of two numbers is 3341 and the diference of their squares is 891. The numbers are :

A) 35 and 46 B) 35 and 50
C) 40 and 55 D) 45 and 60

Answer:   A) 35 and 46



Explanation:

Let the numbers be x and y. Then,

 

x^2+y^2=3341......(1)

 

x^2-y^2=891......(2)

 

Adding (i) and (ii), we get : 2x^2=4232 or x^2= 2116 or x =46

 

Subtracting (ii) from (i), we get : 2y^2= 2450 or y^2 = 1225 or y = 35

 

So, the numbers are 35 and 46

Q:

If a 10-digit number 7220x558y2 is divisible by 88, then the value of (5x + 5y) can be :

 

A) 35 B) 25
C) 15 D) 10
 
Answer & Explanation Answer: C) 15

Explanation:
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0 273
Q:

If a 10-digit number 1230x558y2 is divisible by 88, then the value of (5x + 5y) is:

 

A) 40 B) 20
C) 50 D) 30
 
Answer & Explanation Answer: A) 40

Explanation:
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1 1649
Q:

If an 8-digit number 30x558y2 is divisible by 88, then the value of (6x +6y) is:

 

A) 30 B) 35
C) 42 D) 66
 
Answer & Explanation Answer: C) 42

Explanation:
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0 1508
Q:

If the seven digit number 54x29y6 (x > y)is divisible by 72, what is the value of (2x + 3y)?

 

A) 38 B) 13
C) 32 D) 23
 
Answer & Explanation Answer: D) 23

Explanation:
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0 3668
Q:

Which among the following numbers is exactly divisible by 7, 11 and 13 ?

 

A) 14982 B) 15004
C) 14993 D) 15015
 
Answer & Explanation Answer: D) 15015

Explanation:
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0 10620
Q:

Which among the following numbersis exactly divisible by 11, 13 and 7?


(a) 624613


(b) 624624


(c) 624635


(d) 624646

 

A) (b) B) (c)
C) (a) D) (d)
 
Answer & Explanation Answer: A) (b)

Explanation:
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0 6326
Q:

The ten-digit number 2x600000y8 is exactly divisible by 24. If x ≠ 0 and y ≠ 0, then the least value of (x + y) is equal to:

 

A) 5 B) 8
C) 9 D) 2
 
Answer & Explanation Answer: A) 5

Explanation:
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0 294
Q:

The 10-digit number 79x00001y6 is exactly divisible by 88. What is the value of (x + 3)?

 

A) 5 B) 9
C) 6 D) 7
 
Answer & Explanation Answer: B) 9

Explanation:
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0 10281