GATE Questions

Q:

A number, when 35 is subtracted from it, reduces to its 80 percent. What is four - fifth of that number  ?

A) 175 B) 140
C) 135 D) 95
 
Answer & Explanation Answer: B) 140

Explanation:

x - 35 = 80x/100 

=> x = 175 

=> 4x/5 = 4x175/5 = 140.

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Filed Under: Percentage
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18 13930
Q:

Direction: What should come in the place of question mark (?) in the following number series?

2, 3, 6, 15, 45, ?

A) 90 B) 135
C) 157.5 D) 200
 
Answer & Explanation Answer: C) 157.5

Explanation:

The pattern followed is *1.5 , * 2 , *2.5 , *3 , *3.5

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Filed Under: Numbers
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0 13910
Q:

National Highway No: _____  is called as Shershah Suri Marg ?

A) NH-1 B) NH-3
C) NH-7 D) NH-5
 
Answer & Explanation Answer: A) NH-1

Explanation:

N.H. 1 is also called The Sher Shah Suri Marg between Delhi and Amritsar.

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Filed Under: Indian Geography
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38 13876
Q:

A sum of Rs. 427 is to be divided among A, B and C in such a way that 3 times A’s share, 4 times B’s share and 7 times C’s share are all equal. The share of C is ?

A) 64 B) 76
C) 84 D) 98
 
Answer & Explanation Answer: C) 84

Explanation:

Given total sum = Rs. 427
And given that 3 times A’s share, 4 times B’s share and 7 times C’s share are all equal.
=> 3A = 4B = 7C
But given
=> A + B + C = 427
Now express A and B in terms of C i.e
=> (7C/3) + (7C/4) + C = 427
=> C = 84

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Filed Under: Partnership
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13 13872
Q:

LCM of 80, 85, 90

A) 11440 B) 11998
C) 12240 D) 12880
 
Answer & Explanation Answer: C) 12240

Explanation:

LCM of (80, 85, 90) can be found by prime factorizing them.

 

80 → 2 × 2 × 2 × 2 × 5

85 → 17 × 5

90 → 2 × 3 × 3 × 5

L.C.M of (80,85,90) = 2 × 2 x 2 × 2 × 3 × 3 × 5 × 17

= 16 x 9 x 85

= 144 x 85

= 12240

 

L.C.M of (80,85,90) = 12240.

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97 13870
Q:

Microprocessors as switching devices are for which generation computers?

A) Fourth generation B) Third generation
C) Second generation D) First generation
 
Answer & Explanation Answer: A) Fourth generation

Explanation:

Microprocessors are used in the computers of fourth generation computers. Personal microcomputers were possible due to the microprocessors.

 

Microprocessors further revolutionized the development of computers.

 

The first microprocessor called Intel 4004 was developed by American Intel Corporation in 1971.

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27 13840
Q:

Sum of the ages of Rajesh, Suresh, Mahesh and Dinesh is 76 years. 7 years hence, their age ratio is 7:6:5:8. Find Mahesh’s present age ?

A) 17 years B) 13 years
C) 14 years D) 16 years
 
Answer & Explanation Answer: B) 13 years

Explanation:

Given R + S + M + D = 76

=> R+7 : S+7 : M+7 : D+7 = 7:6:5:8

=> Let the ratio = x

=> M+7 = 5x

=> M = 5x-7

=> R = 7x-7

=> S = 6x-7

=> D = 8x-7

=> R + S + M + D = 76

=> 7x-7 + 6x-7 + 5x-7 + 8x-7 = 76

=> 26x - 28 = 76

=> 26x = 104

=> x = 4

=> Mahesh's present age = 5x-7 = 20 - 7 = 13 years.

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Filed Under: Problems on Ages
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23 13812
Q:

What will come in place of question mark (?) in the following question?

34 of 35 of 23 of ? = 3174

A) 10550 B) 10540
C) 10580 D) 10500
 
Answer & Explanation Answer: C) 10580

Explanation:

23x35x34x?=31743174x10/3= 10580

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0 13801