Codebusters Test Codebusters Logical Puzzles and Riddles 2

Question 1

In a cryptarithmetic puzzle, SEND + MORE = MONEY. What digit does M represent?

Accepted Answer

1

Answer

0

Answer

2

Answer

9

Question 2

A self-referential sentence reads: 'This sentence has ___ letters.' Which number correctly completes it?

Accepted Answer

30

Answer

27

Answer

31

Answer

32

Question 3

If A=1, B=2, ... Z=26 in a simple substitution, what is the product of the values of the letters in 'CAB'?

Accepted Answer

6

Answer

8

Answer

12

Answer

24

Question 4

Three logicians (A, B, C) each see the others' hat colors but not their own. A says 'I don't know.' B says 'I don't know.' C immediately says 'I know.' What logical principle does C use?

Accepted Answer

Common knowledge elimination

Answer

Bayes' theorem

Answer

Direct deduction

Answer

Random guess

Question 5

A number is encoded so that each digit D becomes (D + 5) mod 10. What does encoded digit 3 decode to?

Accepted Answer

8

Answer

2

Answer

7

Answer

3

Question 6

In a logic grid puzzle, five items must be matched to five slots with no repeats. How many total arrangements are possible before applying any constraints?

Accepted Answer

120

Answer

25

Answer

720

Answer

3125

Question 7

A riddle states: 'I have cities but no houses; mountains but no trees; water but no fish. What am I?' What is the answer?

Accepted Answer

A map

Answer

A dream

Answer

A painting

Answer

A mirror