This isn't too tough because the possibilities are few.
The multiples of 7 between 20 and 80 are:
21, 28, 35, 42, 49, 56, 63, 70, and 77.
Of these, when you add 1 ("next year") only one of them becomes a multiple of 5:
49 + 1 = 50
So my age this year is 49. 6 years from now I'll be 55.
52 × 6 = 312 Therefore, 6 years is more than 300 weeks. Note: there are 52 weeks in a year.
That depends on what you are rounding to. 8.6 rounded to the nearest tenth (or less) is 8.6; to the nearest integer is 9; to the nearest multiple of 10 is 10; to the nearest multiple of 100 (or more) is 0.
-3
Yes
Step 1. I look in the hundredths place. If I see a 5 or more I round up, otherwise down, to the next multiple of one tenth. Step 2. The number in the hundredths place is 5 so I know to round up. Step 3. The next higher multiple of one tenth is 21.4. That is the answer.
Find a multiple of 110 that is less than (or equal to) the decimal.Find the difference between this multiple and the decimal.Repeat for the next multiple of 110 (which will be 110 more than the previous multiple).Select the multiple of 110 which gives the smaller answer.
Every prime number except 2 must be odd. This is because if it were even it would be divisible by 2 and so wouldn't be a prime number. The next point to note is that all odd numbers are one more or one less than a multiple of 4. Because 2 more than a multiple of 4 is even, and 3 more than a multiple of 4 is the same as 1 less than the multiple of 4 above. Thus every prime number except 2 must be 1 more or 1 less than a multiple of 4.
the next multiple of 3 is 6 more multiples of 3 would be... 9, 12 ,15 ,18, 21, 24, 27, 30, 33 etc..
20
the 14th one
The same of the past 5000 years. To discover more and more.
More than one millennium is equal to multiple millennia. A millennium refers to a period of 1000 years, so more than one millennium would be multiple sets of 1000 years.
14
27
65
It may be less thirsty.
In that range, every prime number is either one more or one less than a multiple of 4. This also works for 6.