Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Can you find the missing piece of the Porsche?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

What's the best place to go shopping in the ocean?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

What has hands, but can’t clap?

Find the last number in the series below:

voN luJ yaM raM ---