ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

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?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

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

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

Using Only Five 5's and any mathematical operator make sum as 37

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

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