Solution:

pi * z * z * a

Solution:

0! or cos(0)

Solution:

2(remember bodmas)

Solution:

4100

some people might guess 5000

Solution:

25%

Suppose every item is priced at $100. On 20% discount, the price will become $80. Now he must add $20 to each item for original price which is 25% of $80.

Solution:

He have 3 shelf and 4 books.

Solution:

303 , 303 , 303 , 303 , 303

Solution:

245 minutes

It will take 49 cuts not 50.
so 49*5 => 245 minutes

Solution:

33 seconds

The train takes 30 seconds to travel 1 mile, plus 3 seconds for the complete train to pass any point, making a total of 33 seconds.

Solution:

2 hours.

In one hour, Anmol eats 27 pastries, Aakriti eats 12, and Divya eats 21. A total of 60 pastries. Therefore 120 pastries would take 120 ÷ 60 = 2 hours.