Problem: Pub:

As many pubs are centuries old, many of their early customers were unable to read, and pictorial signs could be readily recognised when lettering and words could not be read.

What type of pub signs were useful to an illiterate clientele?
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A: pictorial signs

Problem: Korean War:

On 27 June, Rhee evacuated from Seoul with some of the government. On 28 June, at 2 am, the South Korean Army blew up the highway bridge across the Han River in an attempt to stop the North Korean army. The bridge was detonated while 4,000 refugees were crossing the bridge, and hundreds were killed. Destroying the bridge also trapped many South Korean military units north of the Han River. In spite of such desperate measures, Seoul fell that same day. A number of South Korean National Assemblymen remained in Seoul when it fell, and forty-eight subsequently pledged allegiance to the North.

Who, along with members of the South Korean government, fled South Korea?
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A: Rhee

Problem: European Central Bank:

The ECB's first supplementary longer-term refinancing operation (LTRO) with a six-month maturity was announced March 2008. Previously the longest tender offered was three months. It announced two 3-month and one 6-month full allotment of Long Term Refinancing Operations (LTROs). The first tender was settled 3 April, and was more than four times oversubscribed. The 25 billion auction drew bids amounting to 103.1 billion, from 177 banks. Another six-month tender was allotted on 9 July, again to the amount of 25 billion. The first 12-month LTRO in June 2009 had close to 1100 bidders.

When were the first supplemental LTRO's offered?
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A: March 2008

Problem: Railway electrification system:

Disadvantages of electric traction include high capital costs that may be uneconomic on lightly trafficked routes; a relative lack of flexibility since electric trains need electrified tracks or onboard supercapacitors and charging infrastructure at stations; and a vulnerability to power interruptions. Different regions may use different supply voltages and frequencies, complicating through service. The limited clearances available under catenaries may preclude efficient double-stack container service. The lethal voltages on contact wires and third rails are a safety hazard to track workers, passengers and trespassers. Overhead wires are safer than third rails, but they are often considered unsightly.

Lethal voltages on contact wires and third rails are non a safety hazard for whom?
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A:
unanswerable