First turn the bottom dial to an upside down "A" letter. Then the 4 panels on the side will open up. You are asked to solve the equations to use the telescope
Solution SPOILERS ALERT (DO NOT READ further unless u need to know the solution):
A=2, so take a look at the various dials and find a dial label "A", this is on the LHS of the scope, turn this dial to 2,
Since A+B=5, thus, B=3 (similarly, turn dial B=3)
B-E=A, thus, E=1
If E<2, then E must be either 1 or 0, we solve this as 1, coz B=3. Also there is NO zero on E dial, thus E=1, in addition, 0<E<2 thus, E must be greater than 0 and smaller than 2, only 1 is greater than 0, and yet smaller than 2!
C*B=o, then since B=3, then C=0, I think u must turn the C dial to 1 and -1, you cant set zero coz there is no zero on C, but when I turn this C dial, it always light up 2 digits, thus, its either 1, 0, or -1, 0, or 1, -1. Thus turn press till u see 1, -1 for this dial.
Since D/B=A, and B=3, A=2, thus, D=6
1) There is no ZERO dial on B, thus B is not possible to be zero, if u try the combination:
I already explained abt "B" dial having no Zeros, thus, u are left with 1) to 4) in the combination list above. Then u work your way thru
Hope this helps