How can you tell a raw egg from a hard-boiled egg?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

Can you find out the missing number in the grid?

Name a key which is hardest to turn.

Can you decipher the below rebus?

PBLUESAISNUERSES

How many triangles can you count in the figure given?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months