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

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

How many triangles are there in the picture below?

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?

Our product and our sum always give the same answer. Who are we?

Why is 6 afraid of 7?