Three friends plucked some mangogrove and …

Three friends plucked some mangogrove and collected them together in a pile and took nap after that. After sometime ,one of the friend woke up and divided the mangoes into three equal numbers . There was one extra . He gave it to a monkey nearby, took one part for himself and slept again . Next second friend got up and unaware of what had happened, divided the rest of the mangoes into three eaqual shares . There was an extra mango. He gave it to the monkey,took one share for himself and slept again. Next the third friend got up not knowing what had happened and divided the mangoes into three equal shares. There was an extra mango. He gave it to the monkey, took one share for himself and went to sleep again. After some time, all of them got up together to find 30 mangoes. How many mangoes did the friend pluck, initially?

Wants to make flags from the three ribbon of length 240 CM, 318 CM and 426 CM he has to cut the strings into pieces of equal length what is the greatest possible of length of each piece.

Write the three whole numbers occurring just before 10001

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find the difference between the greatest and the smallest list five digit number that can be written using the number 6 to 743 each only once

8+7=115, 5+3=?