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

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

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

The sum of a mother, her baby and her dog's weight is 170 Kg. How much does the baby weigh if the mother weighs 100 kg more than the combined weight of the baby and the dog, and the dog weighs 60 per cent less than the baby?

What Does this text mean:

important=important

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Solve the counting riddle by identifying the number of triangles in the given picture.

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!