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Four open containers of equal volume are connected as shown.
If the capacity of the pipes is greater than the flowrate from the tap, which container will fill first?
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+ACEBDF
In the above cryptogram, all the letters represent distinct digits.
What is the minimum possible value of the 2-digit integer EF?
Note: In cryptogram problems, 0 is not allowed to be a leading (first) digit, since we would just not write anything in its place.
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If points A,B,C,D,E,F,G,H,I all lie on a circle, as shown above, find ∠A+∠B+∠C+∠D+∠E+∠F+∠G+∠H+∠I in degrees.
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1234⋮4123124341321324421313424231142343121432⋮4321
The 24 distinct 4-digit numbers above have been listed out by arranging 1, 2, 3, and 4 in different orders. What is the sum of these 24 numbers?
Hint: You do not need to list out all 24 numbers to find the sum.
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By using 2 straight lines, what is the most number of regions that we can separate the cross into?
Note: Using 1 straight line, it is possible to separate the cross into 3 regions.
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