what does the below math rebus puzzle mean?

Find the 8 in the below-given Image.

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Decode below rebus
D
N
A
T
S , D

Find the missing number in the image below.

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

What can you see in the middle of March and April that you can never see in any other month?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?