Can You Solve This 6th Grade Geometry Problem From China?

Can You Solve This? 6div2(1+2)=

Can You Solve This Problem ? x^(x^(x^2017)) = 2017

Mahesh has certain number of problems with him. He can solve some fixed number of problems every hour. After solving for 5 hours, he is left with 384 problems. If he had solved for 10 hours, he is left with 144 problems to solve. Find the number of problems with Mahesh initially.

A can solve 75% of the problems in a book on mathematics and B can solve 70%. What is the probability that a problem chosen at random is solved?

The probability that A can solve a problem is 4/5 and B can solve it is 2/3 .If both attempt the problem what is the probability that exactly one of the problem gets solved ?

Shobha’s Mathematics Test had 75 problems i.e, 10 arithmetic, 30 algebra and 35 geometry problems. Although she answered 70% of the arithmetic 40% of the algebra and 60% of the geometry problems correctly she did not pass the test because she got less than 60% of the problems right. How many more questions she would have needed to answer correctly to earn a 60% passing grade?