Can you replace the question mark with the correct number in the below table sequence?

What jumps when it walks and sits when it stands?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Five lovely ladies(Sophia, Isabella, Madison, Emma and Olivia) planned a picnic.

They each buy one thing each for the picnic.

Sophia, Emma and Olivia got a drink : orange-Juice, apple-juice, and mango-juice.
Olivia got the drink with the same letter as the one in her first name.
Emma loves mango-juice.
The other two bring some food : chocolates and pizza.
Also Madison is allergic to cheese.

So which ladies bought what ?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

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?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Which number comes next in the number series?

2, 9, 30, 93, ?

What is the difference between a jeweller and a jailer?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?