## Where are my smart friends? Riddle

Riddle: Where are my smart friends? I had \$3.00. My mom gave me \$10.00. My dad gave me \$30.00. My aunt and uncle gave me \$100.00. I had another \$5.00. How much did I have?

This riddle is about money, Think about a boy had some dollars from family. At the end, we must calculate the boy how much money had? The answer is not 148 dollar.

Solution:

My mom gave me \$10.00.

My aunt and uncle gave me \$100.00.

If you noticed that, all tense at past. So, we must calculate only “I had \$3.00.”   and  “I had another \$5.00.”.

If we sum this money 3 dollars and 5 dollars, The boy had onyl 8 dollars.

## Arianna is deciding between two different movie streaming sites to subscribe to.

Arianna is deciding between two different movie streaming sites to subscribe to.

Plan A costs \$32 per month plus \$1 per movie watched. Plan B costs \$7 per month plus \$2 per movie watched. Let A represent the monthly cost of Plan A if Arianna watches x per month, and let B represent the monthly cost of Plan B if Arianna watches x movies per month. Write an equation for each situation, in terms of x, and determine the number of monthly movies watched, x, that would make the two plans have an equal monthly cost.

Solution:

For the first plan:  cost 32\$ + \$1 per movie == 1.x + \$32

For the second plan: cost \$7 + \$2 pe movie == 2.x + \$7

For the two plans have an equal monthly cost.:

x + 32 = 2x + 7

x = 25.

So,  if Arianna watch 25 movie monthly, cost is equal for the two plans.

## An apprentice baker made 40 liters of 60% sugar syrup instead of 40 liters of 45% sugar syrup.

An apprentice baker made 40 liters of 60% sugar syrup instead of 40 liters of 45% sugar syrup.

How much syrup should she drain and replace with distilled water so that the resulting solution is 40 liters of 45% syrup?

Solution:

Firstly, lets find the only syrup. 40 liters of 60% sugar syrup == 26 liters syrup and 16 litres water.

For the 45% syrup, we must add some woter. We have 26 liters syrup.

If we have a 45% sugar syrup, we need 31.7 liters water for 26 liters syrup.

At the begining, we had 16 liters water. So 31.7 – 16 = 15.6 liters added water.

## A car is traveling at 60 mph. If the rate of speed increases 4 mph each hour

A car or train is traveling at 60 mph. If the rate of speed increases 4 mph each hour, how long will it be before the car is traveling at a rate of 80 mph?

It is an easy math question. Lets look the answer together.

A) 4 hours
B) 5 hours
C) 6 hours
D 7 hours​

Solution:

The speed increases 4 mph every hour from 60 to 80.

80 mph – 60 mph = 20 mph.

20 mph / 4 mph = 5 hours 🙂  Answer is B.

## How much money did I have riddle

Riddle: I have 10\$. My mother gave me 5 dollars. My aunt gave me 15\$. Now, how much money did I have?

It may seem like a simple riddle but it is not. We have to pay attention to a few words. Especially to the last part of the riddle 🙂 Let’s look step by step.

• I have 10\$.
• My mother gave me 5 dollars.
• My aunt gave me 15\$.
• Now, how much money did I have?

My mother an my aunt gave me 20 dollars in the past. It is not clear now if these dollars are still standing. It also says “now” at the end of the riddle. For this reason, I cannot count the 20\$. I received from my mother and aunt.

How much money did I have riddle answer is 5 \$

## A snail climbs a 15 m tree. It climbs 5m every day and sleeps at night.

Riddle: A snail climbs a 15 m tree. It climbs 5m every day and sleeps at night. While sleeping it slides down by 4 m. When does it reach the top?

This is an intresting math question. The correct answer is not 15 meters, of course. Lets’ look the correct answer step by step.

First day, snail clims 5 m and slide down 4 m. It went forward 1 m in total.

Second day, snail clims 5m an slide down 4m. It went forward 2 m in total…

10th day, it went away 10 m in total.

11th day, it climbs 5m and reaches the top before it sleeps again.