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Q:

Heavy Water Project (Talcher) and Fertilizer plant (Paradeep) are famous industries of

A) Andhra Pradesh B) Tamil nadu
C) Kerala D) Orissa
 
Answer & Explanation Answer: D) Orissa

Explanation:
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Filed Under: General Awareness

Q:

 Goa Shipyard Limited (GSL) was established in

A) 1955 B) 1956
C) 1957 D) 1958
 
Answer & Explanation Answer: C) 1957

Explanation:
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Filed Under: General Awareness

Q:

Frederick Sanger is a twice recipient of the Nobel Prize for

A) Chemistry in 1958 and 1980 B) Physics in 1956 and 1972
C) Chemistry in 1954 and Peace in 1962 D) Physics in 1903 and Chemistry in 1911
 
Answer & Explanation Answer: A) Chemistry in 1958 and 1980

Explanation:
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Q:

First China War was fought between

A) China and Britain B) China and France
C) China and Egypt D) China and Greek
 
Answer & Explanation Answer: A) China and Britain

Explanation:
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Q:

The least number which when divided by 5, 6, 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder, is

A) 1677 B) 1683
C) 2523 D) 3363
 
Answer & Explanation Answer: B) 1683

Explanation:

 L.C.M of 5, 6, 7, 8 = 840

 

Therefore, Required Number is of the form 840k+3.

 

Least value of k for which (840k+3) is divisible by 9 is k = 2 

 

Therefore, Required  Number = (840 x 2+3)=1683

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Filed Under: HCF and LCM

Q:

The smallest number which when diminished by 7,  is divisible by  12, 16, 18, 21 and 28 is

A) 1008 B) 1015
C) 1022 D) 1032
 
Answer & Explanation Answer: B) 1015

Explanation:

Required Number = (L.C.M  of 12, 16, 18,21,28)+7

= 1008 + 7

= 1015

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Filed Under: HCF and LCM

Q:

Find the Greatest Number that will devide 43, 91  and 183  so as to leave the same remainder in each case

A) 4 B) 7
C) 9 D) 13
 
Answer & Explanation Answer: A) 4

Explanation:

Required Number = H.C.F  of  (91- 43), (183- 91) and (183-43)

                          = H.C.F of 48, 92, and 140 = 4

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Filed Under: HCF and LCM

Q:

A rectangular courtyard 3.78 meters long 5.25 meters wide is to be paved exactly with square  tiles, all of the same size. what is the largest size of the tile which could be used for the purpose?

A) 14 cms B) 21 cms
C) 42 cms D) None of these
 
Answer & Explanation Answer: B) 21 cms

Explanation:

3.78 meters =378 cm = 2 × 3 × 3 × 3 × 7

5.25 meters=525 cm = 5 × 5 × 3 × 7

Hence common factors are 3 and 7

Hence LCM = 3 × 7 = 21

Hence largest size of square tiles that can be paved exactly with square tiles is 21 cm.

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Filed Under: HCF and LCM