Numerical Ability
- For integers a, b and c, what would be the minimum and maximum values respectively of a + b + c if log|a| + log|b| + log|c| = 0
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log |a| + log |b| + log |c| = 0
It is possible only,
when |a|, |b| and |c| all are equal to 1.
∴ a, b, c may be ±1, ±1, ±1 respectively.
Now for minimum value of all thr ee will be negative.
∴ minimum value = - 3
and maximum value of all three will be positive.
∴ maximum value = +3Correct Option: A
log |a| + log |b| + log |c| = 0
It is possible only,
when |a|, |b| and |c| all are equal to 1.
∴ a, b, c may be ±1, ±1, ±1 respectively.
Now for minimum value of all thr ee will be negative.
∴ minimum value = - 3
and maximum value of all three will be positive.
∴ maximum value = +3
- From the time the front of a train enters a platform, it takes 25 seconds for the back of the train to leave the platform, while travelling at a constant speed of 54 km/h. At the same speed, it takes 14 seconds to pass a man running at 9 km/h in the same direction as the train. What is the length of the train and that of the platform in meters, respectively?
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Train speed (ST) = 54 km/h
Time = 25 sec for travelling length of train and length of platform
Man speed (SM) = 9 km/h
Speed of train to man = 45 km/h
Time = 14 sec
So, length of train = time × speed= 14 × 45 × 5 18
Length of train (L T) = (35 × 5 m) = 175 m
Length of platform (L) + length of train (L T) = speed × time= 54 × 5 × 25 = 15 × 25 = 375m 18
∴ Length of platform (L) = 375 - 175 = 200 mCorrect Option: D
Train speed (ST) = 54 km/h
Time = 25 sec for travelling length of train and length of platform
Man speed (SM) = 9 km/h
Speed of train to man = 45 km/h
Time = 14 sec
So, length of train = time × speed= 14 × 45 × 5 18
Length of train (L T) = (35 × 5 m) = 175 m
Length of platform (L) + length of train (L T) = speed × time= 54 × 5 × 25 = 15 × 25 = 375m 18
∴ Length of platform (L) = 375 - 175 = 200 m
- The perimeters of a circle, a square and an equilateral triangle are equal. Which one of the following statements is true?
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The most symmetric figure will have the largest area.
Hence, circle will be the right answer.Correct Option: A
The most symmetric figure will have the largest area.
Hence, circle will be the right answer.
- Given that a and b are integers and a + a2b3 is odd, which one of the following statements is correct?
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NA
Correct Option: D
NA
- Find the missing group of letters in the following series: BC, FGH, LMNO
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NA
Correct Option: B
NA
