How many 4 digit numbers can you write using only the digits 2 and 5? With each digit having only 2 possibilities, the answer is 2 to the 4th power, which is 16. The 4 is because there are 4 digits. Think about the binary numbers 0000 to 1111, t â¦ here are 2 possibilities for each digit.
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The cost of the GRE revised Genral Test differs depending on the region from where you take the test. If you take the test from US, US Territories or Puerto Rico, the cost of the test is $80 during August and September. After September 30, it will cost you $160. If you are taking the test from any other location, it will cost you $95 during August and September, and double the amount after September 30.