Math Riddles

Question: this is a 6 digit number. this number has two decimal places. there are no tenths or tens in this number. the tenths digit plus the hundredth digit equals 6. if you divide the thousands digit by 2 the answer is 2. the hundreds digit is the same as today's date. the units digit is half the hundredths unit.

Question: When i was 4 my sister was half my age. Now I am 100. How old is my sister now?

Question: In a house of Kardak's family each brother have a sisters as double as their brothers and each sister have brothers as same as their sister. How many brothers and sisters in Kardak's family ?

Question: can you make an equation by using only the no.-4,4,4,4 whose answer will be 20.

Question: 1 11 21 1211 111221 312211 13112221 1113213211 what comes next?