Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

Which tank will fill first?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

I drive at an average speed of 30 miles per hour to the railroad station each morning and catch my train. On a particular morning, there was a lot of traffic and at the halfway point, I had averaged only 15 miles per hour. How fast must I drive for the rest of the way to catch my train?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

By moving just one matchstick, you need to make the below statement true. Can you do it?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10