What place is the 1 at in the number 1?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

What is the average diastolic blood pressure for adults

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?