Q. The average of 18, 24, 30, 36 is:
(A)
25
(B)
27
(C)
28
(D)
30
โ
Correct Answer: (B)
27
Explanation: (18 + 24 + 30 + 36) / 4 = 108 / 4 = 27.
Q. If the cost of 9 pens is โน225, what is the cost of 15 pens?
(A)
โน350
(B)
โน360
(C)
โน375
(D)
โน400
โ
Correct Answer: (C)
โน375
Explanation: Cost per pen = 225/9 = 25 → 25 × 15 = 375.
Q. If 25% of a number is 60, what is 40% of the same number?
(A)
72
(B)
96
(C)
100
(D)
120
โ
Correct Answer: (B)
96
Explanation: 25% = 60 → full number = 60 / 0.25 = 240 → 40% = 240 × 0.40 = 96.
Q. What is the value of 64 ÷ 0.4?
(A)
120
(B)
140
(C)
160
(D)
180
โ
Correct Answer: (C)
160
Explanation: 64 ÷ 0.4 = 64 × 10/4 = 640/4 = 160.
Q. What is the next number in the series: 4, 9, 19, 39, ___?
(A)
69
(B)
79
(C)
89
(D)
99
โ
Correct Answer: (B)
79
Explanation: Pattern: ×2 +1 → (4×2+1), (9×2+1), (19×2+1), (39×2+1) → next = 79.
Q. The HCF of 48 and 64 is:
(A)
12
(B)
14
(C)
16
(D)
18
โ
Correct Answer: (C)
16
Explanation: Greatest common divisor of 48 and 64 is 16.
Q. How much is 15% of 540?
(A)
70
(B)
81
(C)
90
(D)
100
โ
Correct Answer: (B)
81
Explanation: 15% × 540 = (15/100) × 540 = 81.
Q. What is the square root of 900?
(A)
25
(B)
28
(C)
30
(D)
32
โ
Correct Answer: (C)
30
Explanation: 30 × 30 = 900.
Q. A person spends โน240 which is 30% of his income. What is the income?
(A)
โน700
(B)
โน750
(C)
โน800
(D)
โน900
โ
Correct Answer: (C)
โน800
Explanation: 30% = 240 → Income = 240 / 0.30 = 800.
Q. If x + 25 = 80, what is the value of x?
(A)
45
(B)
50
(C)
55
(D)
60
โ
Correct Answer: (C)
55
Explanation: x = 80 - 25 = 55.
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