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You have seven different digits (symbols) to choose from, so you can form seven different one digit numbers and 7×7=72=49 different two digit numbers.
In words; 'Sixty seven thousand'. Inscientific notation 6.7 X 10^(4). By addition 60,000 + 7,000
100/7 = 14.2 therefore the answer is 14 (for the numbers 14,28,42,56,70,84,98)
seventy seven million seven hundred seventy seven thousand seven hundred seventy seven
Are you serious? Seven. There are seven halves in seven halves.