A number preceded by a plus sign in a telephone number is the country code. In the specific case of +65, that's Singapore.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, and many other countries use different prefixes.)
a number plus 65
65 + 65 + 65 + 65 + 65 + 65 + 65 + 65 + 65 + 65 + 65 + 65 = 65 x 12 = 780
70
30 and 41
35
The mean value of 100, 70, 70, and 20 is 65
65 + n = 310Subtract 65 from each side of the equation:n = 245
+65 6507 3000
65+65=130
245
The Changi Airport is located in Singapore. The phone number is +65 6541 2222.
It is already in simplest form! 65 is a prime number. plus 65= 13x5 and those are both prime numbers.