Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

What part of the chicken has the most feathers?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

When we see 2 but call 10?

what does this below rebus represent identXQQQQQME

I am white when I am dirty, and black when I am clean. What am I?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?