What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

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?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.