What is the next number in the series 50, 150, 70, 170, 90, 190, 110, 210, 130, ___?

# Category: Number puzzle

## How do you calculate 1+2+3+4+5+6+7+8+9+10 quickly?

How do you calculate 1+2+3+4+5+6+7+8+9+10 quickly?

## If 2*6=4 ,4*1=7, 8*3=1, what does 5*5=?

If 2*6=4,4*1=7, 8*3=1, what does 5*5=? Solution: 2*6=4, 2+6+4=12 4*1=7, 4+1+7=12 8*3=1, 8+3+1=12 5*5=?, 5+5+?=12 5+5+x=12 10+x=12 x=12-10 x=2 Answer: 2

## Brain teaser math puzzles for intelligence – Puzzle 2

Brain teaser math puzzles for intelligence – Puzzle 2

You can solve this math equation using your brain. Solve the puzzles and improve your logical thinking.

## Brain teaser math puzzles for intelligence – Puzzle 1

You can solve this math equation using your brain. Solve the puzzles and improve your logical thinking.