Before Mount Everest was discovered, what was the highest mountain in the world?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

On this table for two, something is missing for the other one. Your task here is to find the food item that does not have its pair on the table.

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Can you spot the hidden clock in this family photo? Only the most eagle-eyed will find it!

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

What can go up a chimney down, but can't go down a chimney up?

What has one letter and starts with an E?