If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

81 x 9 = 801. What must you do to make the this equation true?

What does this rebus means ?

PROG WORKRESS

Name a key which is hardest to turn.

People put me on the table and cut me but do not eat me. What am I?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

How many letters are in the alphabet?

I have an eye but still cannot see.

Who am I?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?