How can you make number one disappear by adding something to it?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

A sundial has the fewest moving parts of any timepiece. Which has the most?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

What does an Island and the letter T have in common?

Solve below rebus puzzle?

In the image given, you can find several triangles. Can you count them all?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

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