Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

At the local model boat club, four friends were talking about their boats.

There were a total of eight boats, two in each colour, red, green, blue and yellow. Each friend owned two boats. No friend had two boats of the same colour.

Alan didn't have a yellow boat. Brian didn't have a red boat but did have a green one. One of the friends had a yellow boat and a blue boat and another friend had a green boat and a blue boat. Charles had a yellow boat. Darren had a blue boat, but didn't have a green one.

Can you work out which friend had which coloured boats?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Which point will the car reach to go out?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho