Count the number of triangles in the below picture?

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

Count the Triangle in the figure given below:

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

Out of four images which one is the odd one out?

What does the below image rebus riddle means ?

What is so fragile that saying its name breaks it?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H