Explanation

Given:

- Average age of 5 members = 21  

  → Total age of 5 members = 21 × 5 = 105

- When grandfather is included (6 members), average becomes 21 + 9 = 30  

  → Total age of 6 members = 30 × 6 = 180

Now, Grandfather's age = 180 – 105 = 75 years

Explanation

A circle does not have a side and hence no vertex.

Hence, "circle" is different from all other given shapes.

The square has 4 sides,

A hexagon has 6 sides,

triangle has 3 sides. 

Explanation

A+B = 60

B+C = 64

C+A = 68

Add 'em up:

2(A+B+C) = 192

A+B+C = 96

C = (A+B+C) - (A+B)

= 96 - 60

= 36

Last verified on 16-01-2026

Explanation

Explanation

Formula:  

Percentage = (Present Students / Total Students) × 100

Given:  

Present = 340  

Total = 500

Calculation:  

(340 ÷ 500) × 100 = 0.68 × 100 = 68%

Question updated 03-March-2026

Explanation

Painting, Sketch, Drawing → All are forms of hand-made art.

- Picture → Typically refers to a photograph or image captured with a camera, not hand-drawn.

So, "Picture" is different from the rest.

Explanation

1 week = 7 days = 168 hours = 10,080 minutes = 604,800 seconds.

With respect to the Gregorian calendar: 1 Gregorian calendar year = 52 weeks + 1 day (2 days in a leap year)

Explanation

'bitch' is used so freely as a term for a female dog,

 mare is an adult female horse 

Explanation

X is a common factor 

NA22-9-2023

Explanation

Interior angle of a regular n-gon: (n−2)·180°/n = 162°.

Solve:

(n − 2)·180 = 162n

180n − 360 = 162n

180n − 162n = 360

18n = 360

n = 360 / 18 = 20