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ABSENT TONE (Posted on 2005-09-02) Difficulty: 3 of 5
Each of the letters A,E,F,H,O,R,T,W,and X represents a different digit from 0 to 9 in the addition below. Can you find out which letters represent which numbers?
 WORTH
   THE
+EXTRA
------
EFFORT

See The Solution Submitted by Brian Smith    
Rating: 4.5000 (2 votes)

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Solution Solution Comment 20 of 20 |
I ran this for every base from 10 to 36, but only allowing values 0 to 9 and with no leading zeros:  there was only one solution in one base.

In base 11:  only solution
   9 3 5 4 6   
+       4 6 1
+ 1 7 4 5 8 
--------------  
1 0 0 3 5 4

A O R T E F W H X
8 3 5 4 1 0 9 6 7

---------------
for base in range(10,37):
    print(base)
    for A in range(0,10):
        for O in range(0,10):
            if O==A:
                continue
            for R in range(0,10):
                if R in [A,O]:
                    continue
                for T in range(1,10):
                    if T in [A,O,R]:
                        continue
                    for E in range(1,10):
                        if E in [A,O,R,T]:
                            continue
                        for F in range(0,10):
                            if F in [A,O,R,T,E]:
                                continue
                            for W in range(1,10):
                                if W in [A,O,R,T,E,F]:
                                    continue
                                for H in range(0,10):
                                    if H in [A,O,R,T,E,F,W]:
                                        continue
                                    for X in range(0,10):
                                        if X in [A,O,R,T,E,F,W,H]:
                                            continue
                                        worth = W*base**4 +O*base**3 +R*base**2 +T*base+H
                                        the = T*base**2 +H*base +E
                                        extra = E*base**4 +X*base**3 +T*base**2 +R*base+A
                                        effort = E*base**5 +F*base**4 +F*base**3 +O*base**2 +R*base+T
                                        if worth+the+extra == effort:
                                            print('base', base)
                                            print(W,O,R,T,H)
                                            print(T,H,E)
                                            print(E,X,T,R,A)
                                            print(E,F,F,O,R,T)
                                            # print(worth,the,extra,effort)
                                            print(A,O,R,T,E,F,W,H,X)

  Posted by Larry on 2024-02-25 23:11:11
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