For the following questions answer them individually
Age of two persons are in the ratio of 5 : 7. 18 years ago, their ages were in the ratio of 8 : 13. Their current ages are:
Insert mathematical symbols in the place of '?' to get the result of the given equation as 87:
$$((150?2)?2)?10 = 87$$
How many players were named for Sultan Azlan Shah Cup and Commonwealth Games by the Hockey India?
P told Q, "Though I am the son of your father, you are NOT my brother". How is Q related to P?
Let n be the number of different 5-digit numbers divisible by 4, with the digits 4, 5, 6, 7, 8 and 9, no digit being repeated in the numbers. What is the value of n?