456
7.5 grams
He has a number of yellow marbles that leaves a reminder of 2 when divided by 3 and is a number smaller than 22. That is the number of yellow marbles = 2(mod 3).
1 kilogram weighs 1000 grams so 2.47 kilograms = 2470 grams If 1000 marbles weigh 2470 grams then 1 marble weighs 2470/1000 = 2.47 grams
1/5 of 10 = 2.
2
7.5 grams
Six marbles
He has a number of yellow marbles that leaves a reminder of 2 when divided by 3 and is a number smaller than 22. That is the number of yellow marbles = 2(mod 3).
1 kilogram weighs 1000 grams so 2.47 kilograms = 2470 grams If 1000 marbles weigh 2470 grams then 1 marble weighs 2470/1000 = 2.47 grams
ans is 10 marbles
1 gram = 0.001 kilogram 1 kilogram = 1,000 grams
2 out of 3 times 3 out of 5
1/5 of 10 = 2.
48 marbles
5 marbles
at least 39 blue marbles
2