Explanation

729 = 27 × 27

√729 = √(27 × 27)

√729 = 27

Explanation

Average of prime numbers between 30 to 50 will be

31 + 37 + 41 + 43 + 47/5

 =

199/5

 = 39.8

Explanation

• 30% of 100 = 30
• 3% of 1000 = 3/100 × 1000 = 30
• So, 30% of 100 is equal to 3% of 1000.

Explanation

Amount of work done by A and B in 1 day = 1/30

Amount of work done by A and B in 20 days = 20 × (1/30) = 20/30 = 2/3

Remaining work – 1 – 2/3 = 1/3

A completes 1/3 work in 20 days

Amount of work A can do in 1 day = (1/3)/20 = 1/60

=> A can complete the work in 60 days

Explanation

Square (regular quadrilateral):

all four sides are of equal length (equilateral), and all four angles are right angles. 

A triangle that has no equal sides and no equal angles is known as a Scalene Triangle

while 

if two sides of a triangle are of equal length, then it is called. Isosceles triangle