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

Solve the following series:
AZ, GT, MN, __, YB

I am sure no one can have two things for dinner. what are they?

Can you name some countries which do not have the alphabet 'A' in them?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

10+10 and 11+11 can give you the same answer.

Explain how?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

A river should be crossed by a father, a mother and their two sons and two daughters.
There are some rules that should be followed while crossing the river. There can be only two people in the raft while crossing. The daughters cannot be with their father unless there is the presence of the mother. The sons cannot be with their mothers unless the father is present. Unless the guard is on the board, the criminals cannot be with any of the family members. Only the adults like the father, the guard, and the mother knows to use the raft.

How will they cross the river?