Solution:

Toy3 Toy6 | Toy1 Toy7 | Toy2 Toy5 Toy8 | Toy4

Solution:

3 pounds

Explanation:
Since one-quarter of the iron block weighs three-quarter of a pound, the whole the iron block will weigh (3/4 * 4 pounds).

Solution:

Yes, a married person is looking at Sooraj, who is unmarried. If Shaina is unmarried, Pulkit is looking at her who is married.

Solution:

10%

100 - [ (100-85)+(100-80)+(100-75) +(100-70)]
=100-(15+20+25+30)
=100-90

Solution:

Professor Frink said: 'I shall be hanged!' If he was lying, he would be hanged. But that's what the Frink was saying. So he speaks the truth. But if he speaks the truth, he would be beheaded, so then he was not speaking the truth. So it is impossible for the judge to determine wether the person speaks the truth or not. So therefore the judge cannot determine the penalty and sets him free.

Solution:

9^9^9

(its not 999:p)

Solution:

She told them that people were making calls without having to pay.

Solution:

Sunday

Explanation:
71 days = 10 week + 1 day.
+1 day implies Sunday.

Solution:

The original password for Jasmine's account was 'changed' and the new password is 'distinct'.

Solution:

Britney speaks truth on only Thursday.