If 1+9+8=1, what is 2+8+9?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Count the Triangle in the figure given below:

You need to remove two matchsticks to make the below equation true. Can you do it ?

Who always enjoys poor health?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

In the image below, can you find the value of an angle(y)