143
Q:

Ayush was born two years after his father's marriage. His mother is five years younger than his father but 20 years older than Ayush who is 10 years old. At what age did the father get married ?

A) 23 years B) 25 years
C) 33 years D) 35 years

Answer:   A) 23 years



Explanation:

Ayush's present age = 10 years.

His mother's present age = (10 + 20) years = 30 years.

Ayush's father's present age = (30 + 5) years = 35 years.

Ayush's father's age at the time of Ayush's birth = (35 - 10) years = 25 years.

Therefore Ayush's father's age at the time of marriage = (25 - 2) years = 23 years.

Q:

A chord that passes through the center of a circle is

A) secant B) tangent
C) diameter D) perigram
 
Answer & Explanation Answer: C) diameter

Explanation:

A straight line segment whose endpoints both lie on the circle is called as chord. A chord that passes through the center of a circle is a diameter.

 

A_chord_that_passes_through_the_center_of_a_circle_is1553604966.png image

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0 186
Q:

The expression of 5008 km in scientific notation is

A) 50.08 x 10^3 kms B) 5.008 x 10^-3 kms
C) 5.008 x 10^3 kms D) 500.8 x 10^3 kms
 
Answer & Explanation Answer: C) 5.008 x 10^3 kms

Explanation:
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2 204
Q:

Which of the following number is divisible by 24?

A) 37804 B) 2015736
C) 36718 D) 53810
 
Answer & Explanation Answer: B) 2015736

Explanation:

Divisibility rule for 24 is the number should be divisible by 3 and 8. As we know that 24 = 3 x 8

Now, 

Divisibility rule for 3 :

If the sum of the digits of a number is divisible by 3, then the number is divisible by 3.

 

Divisibility rule for 8 :

The last three digits of a number should be divisible by 8.

Hence, check for the given options,

A) 37804 => 804 is not divible by 8.

C) 36718 => 718 is not divible by 8.

D) 53810 => 810 is not divible by 8.

B) 2015736 => 736 is divisble by 8 and sum 2 + 0 + 1 + 5 + 7 + 3 + 6 = 24 which is divisible by 3.

 

Hence, 2015736 is divisible by 24.

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1 111
Q:

The sum of the first 10 prime numbers is

A) even B) odd
C) 0 D) none
 
Answer & Explanation Answer: B) odd

Explanation:

To find the sum of first 10 prime numbers

First 10 prime numbers = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

 

Hence, The sum of the first 10 prime numbers is

(2+3+5+7+11+13+17+19+23+29) = 129 (ODD Number).

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1 229
Q:

A segment with endpoints on the circle

A) secant B) chord
C) tangent D) None of the above
 
Answer & Explanation Answer: B) chord

Explanation:

A segment with endpoints on the circle is a chord. The longest chord of a circle is a diameter of the circle.

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0 127
Q:

17 tens in unit form?

A) One 1 Seven 7 Ten 10 B) One 1 Seven 10 0 ones
C) 1 hundred, 7 tens, 0 ones D) 1 ten and 7 ones
 
Answer & Explanation Answer: C) 1 hundred, 7 tens, 0 ones

Explanation:

Firstly 17 tens = 17 x 10 = 170

17 tens = 170 in unit form can be written as 1 hundred, 7 tens, 0 ones.

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3 310
Q:

284 028 in word form?

A) Twenty eight thousand four hundred and twenty eight B) Two lakhs eighty four thousand twenty eight
C) Twenty eight lakhs forty thousand twenty eight D) Two lakhs eight forty thousand twenty eight
 
Answer & Explanation Answer: B) Two lakhs eighty four thousand twenty eight

Explanation:
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2 235
Q:

When constructing an angle bisector why must the arcs intersect?

Answer

when constructing an angle bisector the arcs must intersect to connect the vertex of the angle.

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4 185