Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Find the next number in the series.
1 10 24 43 67 ?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

What's a single-digit number with no value?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?