To move a Safe, two cylindrical steel bars 7 inches in diameter are used as rollers.How far will the safe have moved forward when the rollers have made one revolution?

A boy found that he had a 48 inch strip of paper. He could cut an inch off every second.How long would it take for him to cut 48 pieces? He can not fold the strip and also, can not stack two or more strips and cut them together.

Rohit was descending from the elavator which was not working. When he had stepped down 7 steps his sir started from the bottom of the elevator and they passed each other and when Rohit had still 4 steps to go down, his sir reached at the top. Taking into consideration that sir's 2 steps took same time as Rohit's one what were the total no of steps?

A+B+C+D=D+E+F+G=G+H+I=17, then the value of D and G?

What is the 5 digit number which has only 2 prime numbers in it and satisfies the following
condition.
a>3rd digit is the largest
b>2nd digit is the smallest
c>1st digit is one less than the 3rd digit and greater than the
addition of 4th and 5th digit.
d>5th digit is between the 1st and 2nd digit and half of the 4th digit.
1 is not considered as the prime number.

A man collects cigarette stubs and makes one full cigarette with every 8 stubs.If he gets 64 stubs how many full cigarettes can he smoke.