Solution:

They were facing each other and not back to back.

Solution:

abracadabra

Solution:

Stationary and Stationery

Solution:

CAT

Explanation:
1. LOCATE
2. EDUCATE
3. CATER
4. CATTLE

Solution:

Not sure.

John Brunner always sneezes before the rain, but it was not mentioned that if Brunner sneezes, it will rain.

Solution:

4 Pounds

Explanation
90% of water = 18 pounds
10% of carbon = 2 pounds

Now,
Earlier 10% of carbon is now contributing 50% weight = 2pounds
Therefore weight of water is also contributing 50% weight = 2pounds

Sum = 4 pounds

Solution:

707

Explanation:
Square of 707 = 70499849
4+9+9+8+4+9 = 43

Solution:

21982030

Explanation:
Next number formed is (number * (number-2)) - number;
i.e
(5 * 3) - 5 => 10
(10 * 8) - 10 => 70
(70 * 68) - 70 => 4690
(4690 * 4688) - 4690 => 21982030

Solution:

Below Six Animal are marked in the picture below.

1. Rabbit
2. Alligator.
3. Camel.
4. Butterfly.
5.Cobra.
6. Deer.

Solution:

The conversation taking place in DST when there is a gap of approx 1hour in one of the city.

Explanation:
Daylight Saving Time (DST) is the practice of setting the clocks forward 1 hour from the standard time during the summer months, and back again in the fall, in order to make better use of natural daylight.
Therefore in case of DST, one city has time 1:30 and another city also can have time 1:30 as in one of them DST has applied and in other it's not.