Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

What is the centre of gravity?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

Jessica is telling her friends this story and asks them to guess if it’s the truth or a lie: “There was a man sitting in a house at night that had no lights on at all. There was no lamp, no candle, and no other source of light. Yet, he sat in the house and read his book happily.” Her friends say she’s lying, but Jessica corrects them and says she’s telling the truth. Jessica’s story is true—but how?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Why are televisions attracted to people?