NTSE Stage-2 (National-Level) Mental-Ability: Questions 35 - 38 of 438
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Question number: 35
Question number: 36
Question number: 37
In this multiplication question the five letters represent five different digits, What are the actual figures? There is no zero.
M = 4, E = 3, A = 9, T = 7, S = 8
M = 3, E = 9, A = 7, T = 4, S = 8
M = 3, E = 9, A = 7, T = 8, S = 4
M = 4, E = 9, A = 3, T = 7, S = 8
Question number: 38
Appeared in Year: 2013
An electrical circuit for a set of 4 lights depends on a system of switches A, B, C and D. When these switches work they have the following effect on the lights: They each change the state of two lights (i. e on becomes off and off becomes on). The lights that each switch controls are as follows.
In configuration 1 shown below, switches CBDA are activated in turn, resulting in configuration 2. One switch did not work and had no effect at all. Which was that switch?