Which is Odd One Out and why?

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A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Why is the Hole below a Lock?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

How can you tell a raw egg from a hard-boiled egg?

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?

It belongs to you, but other people use it more than you do. What is it?