Entrance Exams
Govt. Exams
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Topics in Quantitative Aptitude
Find the LCM of 12 and 18.
Correct Answer:
B. 36
EXPLANATION
12 = 2² × 3; 18 = 2 × 3². LCM = 2² × 3² = 4 × 9 = 36.
What is the HCF of 48 and 64?
Correct Answer:
B. 16
EXPLANATION
Find HCF of 48 and 64 using Euclidean algorithm: 64 = 48 × 1 + 16; 48 = 16 × 3 + 0. Therefore, HCF = 16.
Q.853
Medium
How many ways can 5 books be arranged on a shelf?
Correct Answer:
B. 120
EXPLANATION
5!=120.
Q.854
Easy
A man earns Rs 15000/month and spends 60%. Savings?
Correct Answer:
B. Rs 6000
EXPLANATION
Savings=40% of 15000=Rs 6000.
Q.856
Easy
Area of rectangle: length 12m, breadth 8m?
Correct Answer:
B. 96 sq m
EXPLANATION
Area=12×8=96 sq m.
Q.857
Easy
Sum of first 20 natural numbers?
Correct Answer:
B. 210
EXPLANATION
n(n+1)/2=20×21/2=210.
Q.858
Medium
Selling price Rs 840, profit 20%. Cost price?
Correct Answer:
B. Rs 700
EXPLANATION
CP=840×100/120=Rs 700.