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40 ( forty) is the natural number following 39 and preceding 41 . Though the word is related to four (4), the spelling forty replaced fourty during the 17th century [1] [2] and is now the standard form. Mathematics. Forty is the fourth octagonal number. [3] .
Oct 28, 2015 · 1. Forty is the only number in English whose letters appear in alphabetical order. 2. Minus 40 degrees, or “40 below,” is the only temperature that is the same in both Fahrenheit and Celsius....
The number 40 is spelled forty despite the fact that four contains a u. Even though it is often misspelled fourty, the only widely accepted spelling of the number is forty.
Whether you call it 40 or XL, you're talking about forty: the number between thirty-nine and forty-one. If you’ve ever seen the Roman numeral XL, that means forty, since X equals ten, L equals 50 and if you put the X before the L it means L minus X or 50 minus 10 — which is 40.
40 US dollars to Indian rupees. USD. Converted to. INR. $1.000 USD = ₹83.06 INR. Mid-market exchange rate at 13:59. Track the exchange rate Send money. Spend abroad without hidden fees. Sign up today. USD to INR conversion chart. 1 USD = 83.06320 INR. As of 1 min ago, 1 USD = 83.0632 INR. Mid market rate. Time period. 48 hours. 1 week. 1 month.
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40 has 8 factors: 1, 2, 4, 5, 8, 10, 20, 40. Adding the factors up, the total is 90. 40’s proper factors are all its factors except 1 and 40. There are 6 proper factors for 40: 2, 4, 5, 8, 10, 20. If we also add these up, the total is 49. 40’s factors give it a special property which makes it abundant.
