Just Energy Interview Question: Non-sense problem solving qui... | Glassdoor

Just Energy

Non-sense problem solving quiz. and mathematical problem

solving quiz. such as 1.how many degrees changed in clock between an hour hand and a second hand if time changed from 3 to 3 30. 2.There are cube with 10 by 10 blocks. if surface is painted, how many are not painted.

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got them both correct. But they just wanted to know if I am smart enough, not to know if I am good fit for the position.

Interview Candidate on Jan 4, 2011

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Q1: i thnk you meant the Hour hand and the MINUTE Hand (3pm to 3:30pm)
@3pm, angle between hour n minute hand = 360 x 15/60 = 90 deg

@3:30pm,
360 deg / 12 hours = 30 deg/hour
30 min / 60 min = 0.5
deg for 15min = 30 * 0.5 = 15 deg
angle between hour n minute hand = 90 - 15 = 75 deg

Q2:
1st Method:

Unpainted (the ones inside and not exposed) = 8 x 8 x 8 = 512

2nd Method:
6 painted faces (A B C D E F)
no of cubes on face A & B = (10 x 10 ) x2 = 200
no of cubes on face C & D = (10 x 8 ) x2 = 160
no of cubes on face A & B = (8 x 8 ) x2 = 128

TOTAL Painted = 200 + 160 + 128 = 488

Unpainted = (10 x 10 x 10) - 488 = 512

Saify on Apr 14, 2016