Shape and Size

With 10 sticks divide this figure into four parts that are all equal in shape and size!

1/3 Probability by One Coin

At a restaurant, how can John choose one out of three desserts with equal probability with the help of one coin?

He tosses the coin twice; where he supposes HT, TT and TT correspond to his three choices and if HH he repeats.

Which is the odd one out?

Which is the odd one out?

C.

C has three white and one black on the left and three black and one white on the right. The others are the opposite way round.

Which tile is missing?

Which tile is missing?

In each row and column, every ring is shaded black once.

Next Grid

What grid should come next?

What grid should come next?

(A)

(B)

(C)

(D)

C:

Which number is the odd one out?

Which number is the odd one out?

7768 9678 4572 5261 5133 4638 6895

4638: in the other numbers the sum of the first two digits is equal to the sum of the second two digits, for example in  5133 we have 5+1 = 3+3.