Mental Ability Test - 001
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Question 1 of 5
1. Question
1 pointsWhat is the missing number ‘X’ of the series 7, X, 21, 31, 43?
Correct
7+6 = 13
13+8 = 21
21+10 = 31
31+12 = 43
Incorrect
7+6 = 13
13+8 = 21
21+10 = 31
31+12 = 43
Unattempted
7+6 = 13
13+8 = 21
21+10 = 31
31+12 = 43
-
Question 2 of 5
2. Question
1 pointsThe LCM of two numbers is 2376 while their HCF is 33. If one of them is 297, then the other numbers is
Correct
Given, LCM of two number = 2376
HCF of two number = 33
One of the number = 297
∵ (HCF of two numbers) x (LCM of two numbers) = (First number) x (Second number)
∴ Second number = (33 x 2376)/297
= 264Incorrect
Given, LCM of two number = 2376
HCF of two number = 33
One of the number = 297
∵ (HCF of two numbers) x (LCM of two numbers) = (First number) x (Second number)
∴ Second number = (33 x 2376)/297
= 264Unattempted
Given, LCM of two number = 2376
HCF of two number = 33
One of the number = 297
∵ (HCF of two numbers) x (LCM of two numbers) = (First number) x (Second number)
∴ Second number = (33 x 2376)/297
= 264 -
Question 3 of 5
3. Question
1 pointsIf √y/169 = 54/39, then y is equal to ?
Correct
√y/169= 54/39
⇒ y/169 = (54/39) x (54/39)
∴ y= (54/39) x (54/39) x 169 = 324Incorrect
√y/169= 54/39
⇒ y/169 = (54/39) x (54/39)
∴ y= (54/39) x (54/39) x 169 = 324Unattempted
√y/169= 54/39
⇒ y/169 = (54/39) x (54/39)
∴ y= (54/39) x (54/39) x 169 = 324 -
Question 4 of 5
4. Question
1 pointsOut of the fractions 4/7, 5/13, 6/11, 3/5 and 2/3 which is the second smallest fraction ?
Correct
4/7 = 0.57,
5/13 = 0.38,
6/11 = 0.54,
3/5 = 0.6 and
2/3 = 0.67
Clearly, the second smallest fraction is 6/11Incorrect
4/7 = 0.57,
5/13 = 0.38,
6/11 = 0.54,
3/5 = 0.6 and
2/3 = 0.67
Clearly, the second smallest fraction is 6/11Unattempted
4/7 = 0.57,
5/13 = 0.38,
6/11 = 0.54,
3/5 = 0.6 and
2/3 = 0.67
Clearly, the second smallest fraction is 6/11 -
Question 5 of 5
5. Question
1 pointsSuppose the average weight of 9 persons is 50 kg. The average weight of the first 5 persons is 45 kg, whereas the average weight of the last 5 persons is 55 kg. Then the weight of the 5th person will be
Correct
The average weight of 9 persons is 50 kg.
The average weight of the first 5 persons is 45 kg.
The average weight of the last 5 persons is 55 kg.Therefore, Total weight of all 9 persons = 50 × 9 = 450 kg
Total weight of first 5 persons = 45 × 5 = 225 kg
Total weight of last 5 persons = 55 × 5 = 275 kg
5th person has been included in first 5 persons as well as last 5 persons.
Hence, the weight of the 5th person = (275 + 225) – 450 = 50 kg.
Incorrect
The average weight of 9 persons is 50 kg.
The average weight of the first 5 persons is 45 kg.
The average weight of the last 5 persons is 55 kg.Therefore, Total weight of all 9 persons = 50 × 9 = 450 kg
Total weight of first 5 persons = 45 × 5 = 225 kg
Total weight of last 5 persons = 55 × 5 = 275 kg
5th person has been included in first 5 persons as well as last 5 persons.
Hence, the weight of the 5th person = (275 + 225) – 450 = 50 kg.
Unattempted
The average weight of 9 persons is 50 kg.
The average weight of the first 5 persons is 45 kg.
The average weight of the last 5 persons is 55 kg.Therefore, Total weight of all 9 persons = 50 × 9 = 450 kg
Total weight of first 5 persons = 45 × 5 = 225 kg
Total weight of last 5 persons = 55 × 5 = 275 kg
5th person has been included in first 5 persons as well as last 5 persons.
Hence, the weight of the 5th person = (275 + 225) – 450 = 50 kg.
