There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Can you find out the number that should replace the question mark with a valid reason?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

I’m tall when I’m young, and I’m short when I’m old. What am I?

What does this say?

XLR8

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?