#551 - Cross Bridge Logic Problem

A car is crossing a 20km long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 gram.
Can you tell if the bridge breaks at this point or not?

View Answer Discuss

The bridge will not break.
This is because when the bridge reaches the mid-point, it would have traveled 10km. While traveling 10km, the car would have used more than 200 grams of fuel. Thus, the weight of bird will not add much to the existing weight.

#552 - Calculate Sibling Family Riddle

In a family, there are many children. Every boy in the family has as many brothers as the sisters. However, each girl has twice number of brothers as that of sisters.

Can you calculate the number of siblings in the given family ?

View Answer Discuss

Suppose that the number of boys be "b" and number of girls be "g".

Now, each boy has equal number of brothers and sisters:
(b - 1) = g
=> (b - g) = 1 ------ (1)

In addition, each girl has twice as many brothers as sisters:
2 (g-1) = b
=> (2g - b) = 2 ------- (2)

From (1) and (2)
g = 3 and b = 4

Therefore, there are 4 boys and 3 girls in the family.

#553 - Find Triangles Puzzle

Can you find the number of triangles in the given figure?

Find Triangles Puzzle
View Answer Discuss

The number of triangles in the given figure is 24.

#554 - Cipher Logic Riddle

DEAD, BALL, FEAR, SHOP
The above mentioned letters have been placed in that order using a logic.

Can you find that logic?

View Answer Discuss

A = 1, B = 2, C = 3....

DEAD = 4 + 5 + 1 + 4 = 14
BALL = 2 + 1 + 12 + 12 = 27
FEAR = 6 + 5 + 1 + 18 = 30
SHOP = 19 + 8 + 15 + 16 = 58

Now, 14 < 27 < 30 < 58

Therefore, the order
DEAD, BALL, FEAR, SHOP

#555 - Illusion Riddle

What do you see in image below

Illusion Riddle
View Answer Discuss

Its an awesome illusion vase painted with white or two faces facing each other painted in black.

#556 - Reach Top Riddle

An ape is trying to climb on a pole that is 60 feet high. Due to the slippery surface, the ape climbs 3 feet in a minute only to slip back 2 feet.

How much time do you think the monkey will take to reach the top of the pole?

Hint: The answer is not sixty minutes.

View Answer Discuss

The ape will be able to reach the top in 58 minutes.

Since the ape slips back two feet after climbing 3 feet every minute, he will reach 57 feet in 57 minutes. Now the remaining distance is 3 feet and the ape will take 1 more minute to reach there. He wont slip back because he has already reached the top.

#557 - Accept The Bet Riddle

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

View Answer Discuss

Yes, you should accept the bet. Simply because the odds of picking two relatively prime numbers are 60%. It is a win-win situation for you if you keep playing.

#558 - Split Money Pizza Maths Puzzle

Rihana, Peeta, and Logan order a pizza for $10. Out of the three, Rihana and Peeta were quite hungry and ate 6 slices a piece, while Logan had just 2 slices.

Now, they want to split the cost among them fairly but due to the lack of change, they decide to round of the cost to the nearest possible dollar.

Can you find out the fair way which should be used to split the money?

What if the pizza was worth $11?

View Answer Discuss

If we assume that Rihana and Peeta pay the same amount, they can decide with "rock, paper, scissor" to determine who will pay the extra dollar. Any other method may be used as well. Suppose that Rihana pays $1 extra.

In this manner, Rihana pays $5, Peeta pays $4 and Logan pays $2.

If the pizza would have cost $11, this method will then prove to be great because both Rihana and Peeta will pay $5 each and Logan will pay $1. This will keep the offset same as previous. Rihana is paying 6% more, Peeta is paying 15% more and Logan is paying 27% more.

#559 - Quick Riddle

If all Borks are Grogs and all Grogs are Snorts, are all Snorts Borks ?

View Answer Discuss

No

#560 - Find Ages Riddle

Priyanka and Rubina are having a conversation.

Priyanka: I am definitely not over 30.
Rubina: I am 28 and you are surely 5 years older to me at least.
Priyanka: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

View Answer Discuss

We know that both of them were lying in all their statements. Thus we can assume the opposite of what they said:

Priyanka: I am definitely over 30.
Rubina: I am not 28 and you are at most 4 years older to me.
Priyanka: You are at most 28.

Now we can conclude from the first statement that Priyanka is 31 years old at least. From the second and third statement, we can conclude that Rubina is at most 28 years old. Therefore, the possible ages of Priyanka and Rubina can be:

Priyanka: 31, 32, 33, 34, 35, 36...
Rubina: 22, 23, 24, 25, 26, 27...

If we look at the second statement again, we know the difference between their ages is a maximum of 4 years.
Therefore, Priyanka age is 31 years while Rubina age is 27.