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Q:

What will come in place of the question mark in the series below?

2, 17, 89, 359, 1079, ?

A) 2137 B) 2121
C) 2377 D) 2159
 
Answer & Explanation Answer: D) 2159

Explanation:

Ans. 
17 = 2 x 6 + 5
89 = 17 x 5 + 4
359 = 89 x 4 + 3
1079 = 359 x 3 + 2
? = 1079 x 2 + 1, i.e. ? = 2159

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Q:

Which of the following will yield a reclining decimal?

A) 6024 B) 3024
C) 9024 D) 12024
 
Answer & Explanation Answer: C) 9024

Explanation:
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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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Q:

Find  two  natural  numbers  whose  sum  is  85 andtheleast common multiple is 102.

A) 30 & 55 B) 17 & 68
C) 35& 55 D) 51 & 34
 
Answer & Explanation Answer: D) 51 & 34

Explanation:

Let a + b = 85→b = 85 –a

LCM(a,b) =102→ab = 102

k→a(85 –a) = 102k, where k is a natural number.

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Q:

The sum of two numbers is equal to thrice their difference. If the smaller of the numbers is 10 find the other number.

A) 15 B) 30
C) 40 D) None of these
 
Answer & Explanation Answer: D) None of these

Explanation:

Let larger number be x and smaller number be y.

Also, y = 10

According to question,

⇒(x + y) = 3((x –y)⇒(x + 10) = 3(x –10)

⇒2x = 40⇒x = 20

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Q:

What least value which should be added to 1812 to make it divisible by 7, 11 and 14?

A) 12 B) 36
C) 72 D) 154
 
Answer & Explanation Answer: B) 36

Explanation:
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Q:

How many numbers divisible by 125 can be written by using all the digits 2,3,8,7,5 exactly once?

A) 4 B) 5
C) 6 D) 7
 
Answer & Explanation Answer: A) 4

Explanation:
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Q:

A fraction becomes 6/5 when 5 is added to its numerator and becomes 1/2 when 4 is added to its denominator. What will be the value of the fraction?

A) 8/9 B) 7/10
C) 7/8 D) 6/11
 
Answer & Explanation Answer: B) 7/10

Explanation:
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