What is the next number in the series?

15 29 56 108 208 ?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

I have Rs.50 and I spend it in the way as below.

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

What does below rebus means ?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135