Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

When it's bad luck to meet a black cat?

How many times can you subtract the number two from the number fifty?

Why do Chinese men eat more rice than Japanese men do ?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

You have two bottles of pills marked with labels A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

On 26-01-2022, Juli was murdered at her house in a city in India in the afternoon. There were three suspects in the murder and the following are the statements that were given by them:

John: I visited my village that day.
Jacob: I was out to deposit my house tax in the municipality office at that time.
Jonny: I was at a friend's place having lunch at that time.

Can you find out who is the murderer?