Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Find the value of "a" by solving the maths equation in the picture below:

Solve the following series:
AZ, GT, MN, __, YB

What is the end of everything?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

What word begins and ends with an E, but has only one letter?

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4