Question

The letters L,M,N,O,P,Q,R,S and T in their order are substituted by nine integers 1 to 9 but not in that order. 4 is assigned to P. The difference between P and T is 5. The difference between N and T is 3. What is the integer assigned to N.

Answer 1

P=4

T-P=5
T-4=5
T=5+4
T=9

T-N=3
9-N=3
N=6