The number of children going to the picnic are 25
The answer will be D because only 75 is divisible by 25
25 children are going to a picnic. What is the smallest number of cakes that must be brought to the picnic so that each child receives the same number of cakes?
Options:
(A) 35
(B) 40
(C) 15
(D) 75
(E) 9
(D)

10^2 - 20 = 80
20^2 - 30 = 370
30^2 - 40 = 860
40^2 - 50 = 1550
50^2 - 60 = 2440
60^2 - 70 = 3530.
80 370 860 1550 2440 ?
Options:
(A) 900
(B) 840
(C) 750
(D) 860
(E) 3530
(E)

Answer will be D. Straightforward question.
Sarah's seafood restaurant gets a delivery of fresh seafood every day, 6 days per week, and her delivery company charges her dollars per delivery plus cents per item delivered. If lst week Sarah's seafood restaurant had an average of x items per day delivered, then which of the following is the total cost, in dollars, of last week's deliveries ?
Options:
(A) 6cdx/100
(B) d + 6cx/100
(C) 6d + xc/100
(D) 6d + 6xc/100
(E) 6cdx
(D)