35
Q:

Ravi's brother is 3 years senior to him. His father was 28 years of age when his sister was born while his mother was 26 years of age when he was born. If his sister was 4 years of age when his brother was born, what were the ages of Ravi's father and mother respectively when his brother was born ?

A) 32 years, 23 years B) 32 years, 29 years
C) 35 years, 29 years D) 35 years, 33 years

Answer:   A) 32 years, 23 years



Explanation:

When Ravi's brother was born, let Ravi's father's age = x years and mother's age = y years.

Then, sister's age = (x - 28) years. So, x - 28 = 4 or x = 32.

Ravi's age = (y - 26) years. Age of Ravi's brother = (y - 26 + 3) years = (y - 23) years.

Now, when Ravi's brother was born, his age = 0 i.e. y - 23 = 0 or y = 23.

Q:

Absolute value of 9?

A) 0 B) 9
C) 8 D) -9
 
Answer & Explanation Answer: B) 9

Explanation:

Absolute value of a number :

It means that the distance of a number from 0 on a number line. 

 

Here absolute value of 9 is that on a number line 9 is 9 units away from 0. Hence its absolute value is 9. Similarly, absolute value of -9 means -9 is also 9 units away from the 0 on number line. Hence, absolute value of -9 is also 9.

 

Hence, the absolute value of 9 is 9.

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0 49
Q:

What is the value of 62 tens?

A) 6 B) 620
C) 62 D) 2
 
Answer & Explanation Answer: B) 620

Explanation:

Here in the question it is asked that 62 tens, which implies ten times of 62.

=> 62 x 10 = 620.

 

Hence, the value of 62 tens = 620.

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2 52
Q:

Is a square a rhombus?

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

Yes, a square is a rhombus. But a rhombus is not a square unless the interior angles are at right angles.


 


We know that, a square is a quadrilateral with all sides equal and all the interior angles are 90 deg i.e, at right angles. 


Whereas


a rhombus is also a quadrilateral with all sides equal but the interior angles are not at right angles. Hence, if the interior angles of a rhombus are all at right angles (90 deg), then it is square.

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0 51
Q:

How many times can you subtract 5 from 25?

Answer

Technically or logically it is possible only once. As if you subtract 5 from 25 at first te result will be 20. Now, you can't subtract 5 from 25 since the left number is 20.


 


But if you go mathematically, it can be done infinite times and only 5 times without going into the negatives.

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2 123
Q:

18 tens 20 ones =

A) 1820 B) 180
C) 200 D) 160
 
Answer & Explanation Answer: C) 200

Explanation:

18 tens 20 ones, the given stateent can be split into

18 tens = 18 x 10 = 180

20 ones = 20 x 1 = 20

 

Then add both => 180 + 20 = 200

 

Hence, 18 tens 20 ones = 200.

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1 176
Q:

What is the reciprocal of a negative number?

Answer

The reciprocal of a negative number is always a negative number. So that the number and its reciprocal multiply to 1. 


 


All real numbers except 0 have reciprocals.

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1 149
Q:

Points that lie on the same line are called

A) Congruent B) Coplanar points
C) Collinear points D) None
 
Answer & Explanation Answer: C) Collinear points

Explanation:

Points that lie on the same line are called Collinear points. And that points lie on the same plane are called Coplanar points. 

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1 120
Q:

What is the distance around a circle called

Answer

The distance around a circle is called as Circumference. And that in the case of square or rectangle it is called as Perimeter.

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2 95