A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

What has many keys but can’t open a single lock?

Can you solve below mathematical equation?

2^1234 - 2^1233

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Two brothers were watching a horror film on video late one night. One brother dozed off and dreamed that he was being chased by the crazy man from the movie, who was trying to kill him. In the dream, he hid in a cupboard. There was no sound except his heart pounding, and he had no idea where his crazed captor was. He was terrified! At that moment, the video finished, and his brother put his hand on the shoulder of his sleeping sibling to wake him. The shock at that tense moment was enough that the sleeping brother suffered a massive heart attack and died instantly. True or false?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

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