If it took eight men ten hours to build a wall, how long would it take four men to build it?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

When 99 is considered higher than 100?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

Which letter of the alphabet has the most water?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT