In February every year except for the forth year, one. That is the only month in 28 days
The strength of ordinary portland cement is available in three grades,33 grade - If the 28 days strength is not less than 33 N/mm243 grade - If the 28 days strength is not less than 43 N/mm253 grade - If the 28 days strength is not less than 53 N/mm2
It is any one of the infinitely many fractions of the form (28*n)/(70*n) where n is a non-zero integer or where 1/n is a common factor of 28 and 70.
It is the grade of concrete which indicates the strength of concrete after 28 days curing. M #) means the strength of concrete after 28 days of curing will be 30 N/mm2 .
-53+n = -28 n = -28+53 n = 25
28
There are 7 days in a week
After 1 day you have $1 After 2 days you have $1 + $2 = $3 After 3 days you have $1 + $2 + $4 = $7 After n days you have $1 + $2 + $4 + ... + $2^(n-1) = $(2^n - 1) The number of days in 3 months depends upon which three months are used; however, 3 months is 3/12 = 1/4 of the year. 1 year is approx 365 days, so 3 months is approx 365 ÷ 4 ≈ 91 days So after three months you will have approx $(2^91 - 1) = $2,475,880,078,570,760,549,798,248,447 ≈ $2.476 × 10^27 or approx $2.476 octillion.
28 + N = 68 Subtract 28 from each side: N = 40
It looks like you are asking how many combinations of 6 numbers are there in the 28 numbers 1 through 28. This is known as the number of combinations of 28 things taken 6 at a time. The answer is 28!/(6!22!) (n! means n factorial, which is the product of all the integers from 1 to n). I get 376,740 if I haven't made an error in arithmetic.
28
12 Months in a year120 months in 10 Years360 Months in 30 years.12 Months * 8 Years = 96 Months360 Months + 96 Months = 456 Months
12 weeks after mating