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Q:

If it is possible to form a number which is a perfect square of a two digit odd number using the second, fourth, seventh digits of the number 739142658 using each only once, which of the following is the second digit of that two-digit odd number?

A) 4 B) 7
C) 3 D) none
 
Answer & Explanation Answer: D) none

Explanation:

The 2nd, 4th, 7th digits are 3, 1, 6 respectively.

 

The perfect square of a two-digit odd number, formed using these digits, is 361

 

and 361 = 19^2

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Filed Under: Number, Ranking and Time Sequence Test

Q:

If the position of the first, sixth digits of the number 2796543018 are interchanged, similarly the positions of the the second and seventh digits are interchanged and so on, which of the following will be the left of seventh digit from the left end?

A) 1 B) 7
C) 0 D) 8
 
Answer & Explanation Answer: A) 1

Explanation:

The new number formed is 4  3  0  1  8  2  7  9  6  5

The seventh digit from the left is 7, the 3rd digit from the left of 7 is 1

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Q:

If the following series is written in the reverse order, which number will be fourth to the right of the seventh number from the left?

7, 3, 9, 7, 0, 3, 8, 4, 6, 2, 1, 0, 5, 11, 13

 

A) 5 B) 11
C) 9 D) 0
 
Answer & Explanation Answer: D) 0

Explanation:

The given series when written in reverse order becomes:

13, 11, 5, 0, 1, 2, 6, 4, 8, 3, 0, 7, 9, 3, 7

The seventh number from the left is 6, the fourth number to the right of 6 is 0

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Filed Under: Number, Ranking and Time Sequence Test

Q:

In the following series of numbers, howmany 1, 3, 7 have appeared together. 7 being in middle and 1, 3 on either side of ??

2  9  7  3  1  7  3  7  7  1  3  3  1  7  3  8  5  7  1  3  7  7  1  7  3  9  0  6

A) 4 B) 5
C) 3 D) More than 5
 
Answer & Explanation Answer: C) 3

Explanation:

3  1  7  3  7

3  1  7  3  8

7  1  7  3  9

At these places 1, 7, 3 appeared together

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Q:

In the structure of planet Earth ,below the mantle, the core is mainly made up of which one of the following

A) Aluminium B) Chrromium
C) Iron D) Silicon
 
Answer & Explanation Answer: C) Iron

Explanation:
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Filed Under: World Geography

Q:

Which of the following features may occur when lava cool at the surface

A) Basalt plateau B) Still
C) Batholith D) Dyke
 
Answer & Explanation Answer: A) Basalt plateau

Explanation:
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Filed Under: World Geography

Q:

An instrusion of magma along a bedding plane is called a

A) Dyke B) Still
C) Batholith D) Laccolith
 
Answer & Explanation Answer: C) Batholith

Explanation:
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Filed Under: World Geography

Q:

Which of the following is present in the largest amount in terms of percent by mass in the earth's crust

A) Silicon B) Oxygen
C) Carbon D) Calcium
 
Answer & Explanation Answer: B) Oxygen

Explanation:
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Filed Under: World Geography