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

Explanation

(9 + 43 - 4) = 48

48 ÷ 24 = 2

2 - 2 = 0

So, the correct answer is 0.

Explanation

To find the halfway point:

103 + 301 = 404

404 / 2 = 202

So, the correct answer is 202.

Explanation

To find the number of pieces, divide the total length by the length of each piece:

42.5 meters ÷ 0.85 meters = 50

So, the correct answer is 50.

Explanation

48.95 - 32.006 = 16.944

So, the correct answer is 16.944.

Explanation

Zero is a whole number.

It belongs to the set of whole numbers (0, 1, 2, 3, ...).

Natural numbers start from 1 (1, 2, 3, ...).

Explanation

The logarithm of any number to itself as base is 1.

This is because log(a)/a = 1, where 'a' is any number.

Explanation

A non-terminating, non-recurring decimal cannot be expressed as a fraction.

It is the key characteristic of an irrational number.

Explanation

Multiplying $$0.003 times 0.02 = 0.00006