Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

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

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Can you count the number of quadrilaterals in the picture below?

Name a key which is hardest to turn.

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

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 ()

A man died and leaves Rs.10,000 in his will. There are 6 beneficiaries- his 3 sons and their wives. The 3 wives receive Rs.3960 of which Priyanka gets Rs.100 more than Tanu and Neha gets Rs.100 more than Priyanka.
Pramod gets twice as much as his wife, Tushar gets the same as his wife, and Prashant gets 50% more than his wife.

Who is married to whom?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?