100 Safes Hints levels 21 to 30

Hints and Tips to help you solve 100 Safes.  This page contains the hints for levels 21 to 30.

For hints about the other levels of 100 Safes, navigate here.

100 Safes level 21 Hints:

Simple multiplication.   Did you click on the flag?

100 Safes level 22 Hints:

Bit-wise logic is needed here to open the safe.
To get power to the safe, you need to solve the bit-wise operators so that the line going into the safe has power.

If 0 = no power and 1 = power, i1 = input 1 and i2 = input 2:

OR gate:
i1   i2   Output:
0    0     0
0    1     1
1    0     1
1    1      1

AND gate:
0    0     0
0    1     0
1    0     0
1    1     1

NOT gate:
0           1
1           0

XOR gate:  (exclusive or)
0    0     0
0    1     1
1    0     1
1    1     0

100 Safes level 23 Hints:

There is one number written out in the matrix of letters.

100 Safes level 24 Hints:

3 numbers are written out.
You will read it better if you hold your device flat and look in from the front.

100 Safes level 25 Hints:

Count the letters.

100 Safes level 26 Hints:

This is a sliding puzzle.
Slide the boxes so that the top row = 1 2 3 4,
second row = 5,6,7,8 etc.


100 Safes level 27 Hints:

The stars show 2 numbers.  Tap the telescope to see the 3rd number.  Too easy?

100 Safes level 28 Hints:

Each row starts with a number.
The top row = Three Blind Mice, See How They Run.
The four numbers will make up the code.

100 Safes level 29 Hints:

The numbers encircled at the top are all prime numbers.
The 5 numbers listed below, work out if the are prime or not.  Change the correct tick to an X if it is not prime.  The safe code will be the black numbers to the right of the ticks.


100 Safes level 30 Hints:

Check mate in 1 move.
There is only 1 possible way to get it right.
Promote the pawn on B7 to a knight!!  (Move B7 to B8)