What four weights can be used to balance from 1 to 30 pounds?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

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

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

O_er_t_o_

Complete the missing letters of the given word.

Ten coins have been arranged as you can see in the given picture. In this arrangement, a triangle is formed pointing upwards. You have to invert the position of the triangle and make it point downwards while changing the position of 3 coins only. Can you do it?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Find the next number in the series.
1 10 24 43 67 ?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?