07. Quiz #4 - Q & A

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 Hey everyone,

In this post, I will be providing you the answers for Quiz #4: https://youtu.be/bpdq9UTMAcM

You can check your answers with this and comment your scores or opinions in the comment section below.
  • Which number best completes the analogy - 6:3 as 10: ?
A. 3
B. 5
C. 7
D. 9

Ans: B
Explanation: The ratio between the two expressions is equal, so x/10 = 3/6
x/10 = 1/2
2x = 10
x = 10/2
x = 5
  • Which of the following can be arranged into a five-letter English word?
A. HUYTP
B. POKTR
C. GHUJO
D. UBDIL

Ans: D
Explanation: UBDIL can be arranged into BUILD.
  • Find the next letter in the sequence: A, C, F, J, ?
A. L
B. M
C. O
D. P

Ans: C
Explanation: If you notice the pattern in the sequence, it is the first letter, third letter, sixth letter and the tenth.
1, 3, 6, 10, ?
The difference between the first two terms is 2, second and third terms is 3 and third and fourth terms is 4. So the difference between the fourth and fifth terms is 5.
10 + 5 = 15
The fifteenth letter in the alphabet is O. 
  • Find the answer that best completes the analogy: Book is to reading as Pen is to ?
A. Reading
B. Writing
C. Stirring
D. Playing

Ans: B
Explanation: Pen is to writing. You can't read, stir or play with a pen.
  • If A + D = E, then what is C + F = ?
A. G
B. H
C. I
D. J

Ans: C
Explanation: A is the first letter of the alphabet whereas D is the fourth. E is the fifth letter of the alphabet.
A + D = (1) + (4) = (5) = E

C is the third letter of the alphabet and F is the sixth. So C + F = (3) + (6) = (9).
The ninth letter of the alphabet is I.
  • Find the next number in the sequence: 1, 1, 2, 3, 5, 8, ?
A. 9
B. 11
C. 13
D. 15

Ans: C
Explanation: This is a Fibonacci sequence and the next term of the sequence is the result of the sum of the previous 2 terms.
The third term is the sum of the first two terms. 1 + 1 = 2
The fifth term is the sum of the third and fourth terms. 2 + 3 = 5.
Therefore the next term of the sequence is the sum of 5 and 8. 5+8 = 13.
  • 2304 is a perfect square. What is its square root?
A. 42
B. 52
C. 48
D. 58

Ans: C
Explanation: Try out a rough estimation. 40^2 = 1600 and 50^2 = 2500. 2304 comes between 40^2 and 50^2 so the options are either A or C.
45^2 = 2025
2304 is greater that the square of 45 so its square root is between 45 and 50. Therefore, the answer is 48.
  • Find the value of |x+3-|2x+4|| at x = 5
A. -6
B. 6
C. 2
D. -2

Ans: B
Explanation: Substitute the value of x in the expression. 2x+4 = 2x5 + 4 = 10 + 4 = 14.
The modulus doesn't have any effect on this result because it is positive.
x+3 = 5+3 = 8
8 - 14 = -6
This result comes within modulus so -6 becomes 6.
  • I'm tall when I'm young and short when I'm old. Who am I?
Candle/ Pencil
  • Which number is the odd one out?
A. 43
B. 53
C. 63
D. 73

Ans: C
Explanation: C is not a prime number whereas the others are. 9 x 7 = 63.


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