Can you help me with some questions about bits, decimals/binary/octal/hexadecimals?

We were asked to not use a calculator, so I struggled trying to solve some of the last questions.

1.) The binary representation of decimal 42 is 00101010. True or False?

2.) The hexadecimal representation of decimal 35 is 33h. True or False?

3.) The sum of all powers of 2 from 2⁰ to 2⁸ is 511. True or False?

4.) The decimal representation of the unsigned 29F_Hex is _______.

5.) The Binary representation of the unsigned 29F_Hex is _______.

6.) The Hexadecimal representation of the unsigned 1111 1110 1101 1011_bin is _______.

7.) The Binary representation of the unsigned F69BDC2A_Hex is _______.

8.) The Octal representation of the unsigned F69BDC2A_Hex is _______.