Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

Can you decipher the below rebus?

PBLUESAISNUERSES

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?