#11 - Most Popular Number Series IAS Problem

Difficulty Popularity

Can you solve the number series problem by replacing boxes with number 1, 3 , 5 , 7 ,9 , 11 , 13 , 15?

Note: You can also repeat the number.

This interesting problem was asked in India's one of toughest competitive exam UPSC(IAS/IPS).

#12 - Extremely Hard Civil Services Problem

Difficulty Popularity

( ) + ( ) + ( ) + ( ) + ( ) = 30
This is what you have for equation. The following are the numbers that you can use to fill in the brackets:
1, 3, 5, 7, 9, 11, 13 and 15

You can repeat the numbers if required. The resulting sum should be 30.

This question appeared in the UPSC final examination in December 2013. Out of all the people who appeared, only one guy was able to solve this namely Gaurav Agarwal.

Can you solve it?

#13 - Find the next number in series

Difficulty Popularity

Can you find next number in tricky mathematical series below?

111 , 113 , 117 , 119 , 123 , 137 ?
category : SERIES

#14 - Tough Maths Sequence Riddle

Difficulty Popularity

What missing numberin the Sequence 5 15 5 18 5 ? 14 20 5
category : SERIES

#15 - Find the next number in this series

Difficulty Popularity

Find the next number in the sequence

1, 2, 6, 21, 88, __?
category : SERIES

#16 - Picture Arrow Riddle

Difficulty Popularity

In which direction should the missing arrow point ?

category : SERIES | PICTURE

#17 - Tricky Equation To Solve Riddle

Difficulty Popularity

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on above logic, can you prove that
11 - 1 = 10 ?

#18 - Ball Series Puzzle

Difficulty Popularity

In this famous ball puzzle, can you complete the series by finding the value of "?"

#19 - Riddle In A Riddle

Difficulty Popularity

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint : Look into the title of the Riddle
category : SERIES | TRICK

#20 - Maths Pyramid Brain Teaser

Difficulty Popularity

Complete the pyramid my replacing ? with the correct number.
1
1 1
2 1
1 2 1 1
1 1 1 2 2 1
? ? ? ? ? ?
? ? ? ? ? ? ? ?
category : LOGIC | SERIES

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