What is the longest word in the dictionary?

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

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

What does this say?

XLR8