Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

A few friends are enjoying their sea voyage in a boat full of apples. On the way, they felt hungry and thus decided to eat the apples. Together, they ate two dozen of apples. When they have eaten the apples, will there be any change in the water level?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

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.

Can you count the number of lines in the below picture?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

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

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Be active and find the killer in the picture Riddle below.