17 - -23 can be turned into 17 + 23 because of the double negative, so 17 minus negativ 23 is 40. :]
2 ,5, 11, 23, 47, 95 ....... Double up each time: 3, 6, 12, 24, 48 ........
353, each time you double the number then take 1 away.
Prime factorization of 46 is 2 X 23. We can do this easily by taking it one step at a time: First, 46 is an even number so we can divide it by 2. Since 2 is prime, it must be a prime factor! Now we have 23, which is a prime number. Double check: 2 * 23 = 46, and we're done!
double of 35 is 70
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