## preduction

what is the signal

## Post Gravity Test

Test

## Gravity Test 5:58

Gravity Test

## Android Moto test

Moto test

## Addition

Test

## System2 – Check

System

## 4-digit number

How many 4-digit numbers are there with no digit repeated?

## Triangular matrix

If U1, U2 are upper triangular and L1, L2 are lower triangular, which of...

## The sunrise problem

Two women start walking at the sunrise, one from point A to B and...

## Calculate A+B+C+D

Find (A + B + C + D) such that AB x CB =...

## Solve

Solve

## Puzzle

Can you solve in 1 minute?? Can you solve in 50 seconds? can you...