Irfan says that he has 7 marbles more than five times the marbles Parmit has Irfan has 37 marbles. How many marbles does Parmit have?

Nazia has 20 marbles. Reshma has 1/5 of the number of marbles that Nazia has How many marbles does Reshma have ?

Farida has 20 marbles Reshma has 1/5th of the number of marbles what Farida has.how many marbles Reshma has ?

A bag of 25 marbles is shared between Rahul and Kiran in the ratio of 2:3 - How many marbles does kiran receive ?

A bag of 25 marbles is shared between Rahul and Kiran in the ratio of 2:3 - How many marbles does Rahul receive ?

Rafi has 16 red marbles and 4 blue marbles. Find the ratio of red marbles to blue marbles Rafi has ?

A bag of 25 marbles is shared between Rahul and Kiran in the ratio 2: 3 How many marbles does Rahul receive?

Helium atom has an atomic mass of 4u and two protons in its nucleus. How many neutrons does it have?

Represent the following situations with suitable mathematical equations. Sridhar and Rajendar together have 45 marbles. Both of them lost 5 marbles each, and the product of the number of marbles they now have is 124. We would like to find out how many marbles each of them had previously.

If X and Y are two sets such that X ∪ Y has 50 elements, X has 28 elements and Y has 32 elements, how many elements does X ∩ Y have ?

If S and T are two sets such that S has 21 elements, T has 32 elements, and S ∩ T has 11 elements, how many elements does S ∪ T have?