## Math (page 2)These are fun math riddles. All of these tricky riddles are based on real math concepts and can be solved with purely math and logic. These are the tasks listed 11 to 20. |

## MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?**23**

**Djordje Timotijevic**.

## What is the 4 digit number i...

What is the 4 digit number in which the first digit is one-fifth of the last, and the second and third digits are the last digit multiplied by 3?**37**

**Djordje Timotijevic**.

## Find number abc

If 86b7a - 25a26 = 6a2c5 find number abc. Multiple solutions may exist.**27**

**Djordje Timotijevic**.

### Beethoven's Ninth

The symphony orchestra was performing Beethoven's Ninth.

In the piece, there's a long passage, about 20 minutes, during which the bass violinists have nothing to do.

Rather than sit around that whole time looking stupid, some bassists decided to sneak offstage and go to the tavern next door for a quick one.

After slamming several beers in quick succession, one of them looked at his watch and said, "Hey! We need to get back!"

"No need to panic," said a fellow bassist. "I thought we might need some extra time, so I tied the last few pages of the conductor's score together with string. It'll take him a few minutes to get it untangled."

A few moments later they staggered back to the concert hall and took their places in the orchestra.

About this time, a member of the audience noticed the conductor seemed a bit edgy and said as much to her companion.

"Well, of course," said her companion. "Don't you see? It's the bottom of the Ninth, the score is tied, and the bassists are loaded."

## Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?**74**

**H Tav**.

## MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?**25**

**Thinh Ddh**.

## Calculate the number 3097

NUMBERMANIA: Calculate the number 3097 using numbers [3, 1, 3, 8, 60, 655] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**11**

**Thinh Ddh**.

## Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?**19**

**Thinh Ddh**.

## Find number abc

If 5b9b8 - 3c688 = c5c9a find number abc. Multiple solutions may exist.**16**

**Djordje Timotijevic**.

## Calculate the number 997

NUMBERMANIA: Calculate the number 997 using numbers [2, 9, 3, 2, 87, 478] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.**8**

**Djordje Timotijevic**.

## Find the next number in the ...

Find the next number in the sequence 517, 1251343, 181251276427, ...**12**

**H Tav**.