Can you solve the maths in the below-given picture equation?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

What Deficiency does the below rebus represent?

VIT_MIN

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

What does this below rebus puzzle mean?