#691 - The Prime Number Riddle

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

View Answer Discuss

Except 2 and 3, all the prime numbers are in a form of (6k +1) or (6k -1)
Therefore, you can use the formula to write down the prime numbers as:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 61, 67, 71, 73

Now, you can separate numbers as per the requirement that are:
3, 11, 13, 23, 31, 41, 43, 53, 61, 71 and 73

#692 - Brick Optical Illusion Puzzle

This is a classy optical illusion puzzle.What more you can find except bricks in the image below?

Brick Optical Illusion Puzzle
View Answer Discuss

A cigar stuck in the wall

#693 - Cyclic Unique Number Puzzle

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains same digits only.

Can you find that number ?

View Answer Discuss

142857

142857 * 1 = 142857
142857 * 2 = 285714
142857 * 3 = 428571
142857 * 4 = 571428
142857 * 5 = 714285
142857 * 6 = 857142

These number are considered as cyclic numbers.

#694 - Ice Cream Seller Riddle

On occasion of Diwali (a Hindu festival), the local ice cream seller is selling ice cream at an 80% discount. But, he got just two flavours, vanilla and cocoa-chipped. He is selling vanilla at Rs1 and Choco-chip at Rs2. However, he is giving just one ice cream to each person.

Shruti went to the shop and give the seller Rs.2 and without asking her the seller gives her Choco-chip ice cream. Next, Anmol comes and also gave the seller the same amount i.e. Rs2. Now the seller asks Anmol which ice-cream does he wants.

Why such a different behaviour towards Shruti and Anmol?



View Answer Discuss

Shruti puts 2 Rs1 note which indicate that she needed the choco-chip ice cream. If she needed the vanilla she must have put just one Rs1 note. Anmol put just 1 Rs2 note, so the seller can not judge which ice cream he wants.

#695 - Clash Royale Bomber Cost Puzzle

In "Clash Royal" App Game, Warrior "The Bomber" is a very good defensive options. It can be purchased from the card shop.The cost of the bomber is quite interesting.The Cost of 1st bomber is: 2The Cost of 2nd bomber is: 4The Cost of 3rd bomber is: 6The Cost of 4th bomber is: 8The Cost of 5th bomber is: 10i.e to buy 5 bombers you need 2+4+6+8+10 = 30 coins.How many bombers can you buy using 1000 coins ?

Clash Royale Bomber Cost Puzzle
View Answer Discuss

62

The Cost of 1st bomber is: 2 i.e Total coins spend: 2
The Cost of 2nd bomber is: 4 i.e Total coins spend: 6
The Cost of 3rd bomber is: 6 i.e Total coins spend: 12
The Cost of 4th bomber is: 8 i.e Total coins spend: 20
The Cost of 5th bomber is: 10 i.e Total coins spend: 30
The Cost of 6th bomber is: 12 i.e Total coins spend: 42
The Cost of 7th bomber is: 14 i.e Total coins spend: 56
The Cost of 8th bomber is: 16 i.e Total coins spend: 72
The Cost of 9th bomber is: 18 i.e Total coins spend: 90
The Cost of 10th bomber is: 20 i.e Total coins spend: 110
The Cost of 11th bomber is: 22 i.e Total coins spend: 132
The Cost of 12th bomber is: 24 i.e Total coins spend: 156
The Cost of 13th bomber is: 26 i.e Total coins spend: 182
The Cost of 14th bomber is: 28 i.e Total coins spend: 210
The Cost of 15th bomber is: 30 i.e Total coins spend: 240
The Cost of 16th bomber is: 32 i.e Total coins spend: 272
The Cost of 17th bomber is: 34 i.e Total coins spend: 306
The Cost of 18th bomber is: 36 i.e Total coins spend: 342
The Cost of 19th bomber is: 38 i.e Total coins spend: 380
The Cost of 20th bomber is: 40 i.e Total coins spend: 420
The Cost of 21st bomber is: 42 i.e Total coins spend: 462
The Cost of 22nd bomber is: 44 i.e Total coins spend: 506
The Cost of 23rd bomber is: 46 i.e Total coins spend: 552
The Cost of 24th bomber is: 48 i.e Total coins spend: 600
The Cost of 25th bomber is: 50 i.e Total coins spend: 650
The Cost of 26th bomber is: 52 i.e Total coins spend: 702
The Cost of 27th bomber is: 54 i.e Total coins spend: 756
The Cost of 28th bomber is: 56 i.e Total coins spend: 812
The Cost of 29th bomber is: 58 i.e Total coins spend: 870
The Cost of 30th bomber is: 60 i.e Total coins spend: 930
The Cost of 31st bomber is: 62 i.e Total coins spend: 992

#696 - Nice Who Am I Riddle

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I ?

View Answer Discuss

I am a Tea Bag.

#697 - Ice Cream and House Number Riddle

A small town is visited by an ice-cream truck every day. On the first day of February, the truck visits as usual and 5 children, one from each of the first 5 houses on the street buys an ice cream that is of the different flavor from each other along with a completely different topping.

Go through the details below and find out which child lives in which house and bought which ice-cream flavor with which topping:

1. Jim lives between the child who bought the Raspberry topping and the child who bought mango ice cream.

2. Joyce, whose house has an even number, bought the cherry topping. Nancy does not live next to Joyce.

3. The blackcurrant ice cream had no topping.

4. The child who lives in house number 2 had the butterscotch ice cream. The child in house number 3 did not have chocolate ice cream.

5. Mike had banana ice cream. He hates banana cherry.

6. The child who had the cashew topping lives in house number 5. Dustin does not live in house number 4.

Please note that the odd numbered houses and the even numbered houses are located on the exactly opposite sides of the street.

View Answer Discuss

Jim lives in house number 3 and bought blackcurrant ice cream with no topping.
Dustin lives in house number 2 and bought butterscotch ice cream with the banana cherry.
Nancy lives in house number 5 and bought mango ice cream with cashew.
Joyce lives in house number 4 and bought chocolate ice cream with the cherry.
Mike lives in house number 1 and bought banana ice cream with raspberry.

#698 - The Month Rebus

Can you guess the name of month by looking the below rebus ?

The Month Rebus
View Answer Discuss

JulyCut the Image horizontal and look into the bottom image you will get the below image.

#699 - Cricket Puzzle Question

It is a strange cricket match in which batsman is getting bowled in the very first ball he faced. Assuming no extras in the match, which batsman will be not out at the end of the inning ?

Cricket Puzzle Question
View Answer Discuss

Eight batsmen.

--> 1st over < --
1st Ball : Batsman-1 got out
2nd Ball : Batsman-3 got out
3rd Ball : Batsman-4 got out
4th Ball : Batsman-5 got out
5th Ball : Batsman-6 got out
6th Ball : Batsman-7 got out

--> 2nd over < --
1st Ball : Batsman-2 got out
2nd Ball : Batsman-9 got out
3rd Ball : Batsman-10 got out
4th Ball : Batsman-11 got out

Note: Batsman 2 is on non-striker end at the start of the match and after an over batsman on two end switches end.

#700 - Which Number Riddle

Which number should replace the question mark in the picture below ?

Which Number Riddle
View Answer Discuss

26

14 = 1^2 + 2^2 + 3^2
21 = 4^2 + 1^2 + 2^2
29 = 4^2 + 3^2 + 2^2
26 = 3^2 + 4^2 + 1^2