Fit the Black square puzzle #shorts

Which of the following is the outer layer of the Earth that is made of plates which fit together like a jigsaw puzzle?

In a bangle shop, the shopkeeper displays the bangles in the form of a square then he is left with 38 bangles with him. If he wanted to increase the size of square by one unit each side of the square he found that 25 bangles fall short of in completing the square. The actual number of bangles which he had with him in the shop was :

In how many ways is it possible to choose a white square and a black square on a chess board so that the squares must not lie in the same row or column?

3 students {A, B, C} tackle a puzzle together and offers a solution upon which majority of the 3agrees. Probability of A solving the puzzle correctly is p. Probability of B solving the puzzle correctlyis also p. Cisa dumb student who randomly supports the solution of either A or B. There is one morestudent D, whose probability of solving the puzzle correctly is once again, p. Out of the 3 memberteam {A, B, C} and one member team {D}, which one is more likely to solve the puzzle correctly.