If you knew that 8*300=2400
Then you could likely figure that 8*20=160
And then just add the two together to get 2560
The numbers are in different orders so that makes both ratios completely different.
Answer:
(a) 498501
(b) 251001
Step-by-step explanation:
According Gauss's approach, the sum of a series is
.... (1)
where, n is number of terms.
(a)
The given series is
1+2+3+4+...+998
here,



Substitute
,
and
in equation (1).



Therefore the sum of series is 498501.
(b)
The given series is
1+3+5+7+...+ 1001
The given series is the sum of dd natural numbers.
In 1001 natural numbers 500 are even numbers and 501 are odd number because alternative numbers are even.



Substitute
,
and
in equation (1).




Therefore the sum of series is 251001.
I’m gonna say that the answer is 5: 14
Answer:
608.33 cm
Step-by-step explanation:
that is a simple subtraction :
703.33 - 95 =
in our heads : let's assume we initially subtract only 93.
then it is easy
703.33 - 93 = 610.33
and now we subtract the remaining 2 (to subtract in total 95), and we get
608.33 cm