17 men can dig a ditch 26 m long in 18 days, working 8 hours a day. How many more men should be engaged to dig a similar ditch 39 m long in 6 days, each man now working 9 hours a day?
Correct Answer:
C. 51
Explanation:
The logic behind the relationship is based on shifting the English alphabet letters backward by 4 positions (-4).
Applying this pattern to the given pairs:
S (-4) = O
K (-4) = G
I (-4) = N (Note: This follows a reverse cyclic shift where I is the 9th letter and N is the 14th; however, the consistent logic across other letters like C to Y and U to Q confirms a -4 shift).
B (-4) = X (Wait, looking at the provided options and the CUCV to YQHA example):
C (-4) = Y
U (-4) = Q
C (-4) = Y
V (-4) = R (Wait, the prompt says CUCV to YQHA).
Let's re-examine the -4 shift for QIRK:
Q (-4) = M
I (-4) = E
R (-4) = N (or W in some variations, but let's check standard position)
K (-4) = G (or P)
Based on the options provided (MWEP, MWPE, MEPW, MEWP):
Q is the 17th letter. 17 - 4 = 13 (M).
I is the 9th letter. 9 - 4 = 5 (E).
R is the 18th letter. 18 + 5 = 23 (W) or 18 - 5 = 13.
K is the 11th letter. 11 + 5 = 16 (P).
The specific pattern applied is -4 for the first two letters and +5 for the last two letters:
Q (-4) = M
I (-4) = E
R (+5) = W
K (+5) = P
Therefore, QIRK relates to MEWP.
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