Can you replace the question mark with the correct number?

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?

What is the difference between a jeweller and a jailer?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Our product and our sum always give the same answer. Who are we?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

Make a sentence consisting of three words that have the whole alphabet.

What's the only room from which no one can enter or leave

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?