Solution:

11 / .11

Solution:

199 - 99

Solution:

130

Explanation:
(1*1*1)+1 = 02
(2*2*2)+2 = 10
(3*3*3)+3 = 30
(4*4*4)+4 = 68
(5*5*5)+5 = 130

Solution:

180

Solution:

2

36 - 6 / (1/6) + 2
= 36 - 6 * 6 + 2
= 36 - 36 + 2
= 2

Solution:

Mercury

Solution:

4100.

In a survey conducted 1/5 has written answer ar 5000.

1000 + 40 = 1040
1040 + 1000 = 2040
2040 + 30 = 2070
2070 + 1000 = 3070
3070 + 20 = 3090
3090 + 1000 = 4090
4090 + 10 = 4100 ... The answer

Solution:

36

Solution:

58

Solution:

In a clock.

Explanation:
1300 + 20 = 1:00PM + 20 minutes = 1:20 PM

1400 - 40 = 2:00PM - 40 minutes = 1:20 PM