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Currencies
Which of the following is the weakest currency in the world by exchange rate value against the US dollar?
Explanation and memory cue
Recent data from multiple financial sources indicate that the Iranian Rial (IRR) is the weakest currency in the world by exchange rate value against the US dollar, with one US dollar equaling hundreds of thousands of Iranian Rials. The Vietnamese Dong (VND) is also very weak but ranks behind the Iranian Rial in terms of lowest value per unit. The Guinean Franc and Indonesian Rupiah are stronger compared to these two. Therefore, the correct answer is the Iranian Rial, not the Vietnamese Dong.