Basic Arithmetic

5 questions available

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All Number System 55 Fractions & Decimals 52 BODMAS & Simplification 53 Factors & Multiples 1 LCM & HCF 5 Divisibility 6 Approximation 30
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Q1.Find HCF of 48, 80, and 48p-80 Then P will be?

Medium
A 2
B 3
C 4
D 5
LCM & HCF PPSC 2026

Correct Answer: A

Q2.Two numbers are in the ratio 4:5 and their LCM is 180. What is the smallest of these two numbers?

Medium
A 9
B 15
C 36
D 45
LCM & HCF PPSC

Correct Answer: C

Let numbers be 4x and 5x. Their LCM is 20x = 180 => x = 9. The smaller number is 4 * 9 = 36.

Q3.Two numbers are in ratio 3 : 4 and their LCM is 240. What is the smaller of these two numbers?

Medium
A 45
B 48
C 60
D 180
LCM & HCF PPSC

Correct Answer: C

Let the numbers be 3x and 4x. Their LCM is 12x = 240 => x = 20. The smaller number is 3x = 3 * 20 = 60.

Q4.The Least Common Multiple (LCM) of 12 and 15 is:

Medium
A 30
B 60
C 180
D 90
LCM & HCF PPSC

Correct Answer: B

Prime factors: 12 = 2^2 * 3, 15 = 3 * 5. LCM = 2^2 * 3 * 5 = 60.

Q5.LCM of 30 and 36 is?

Medium
A 90
B 180
C 120
D 60
LCM & HCF PPSC

Correct Answer: B

Prime factors: 30 = 2 * 3 * 5, and 36 = 2^2 * 3^2. LCM is 2^2 * 3^2 * 5 = 4 * 9 * 5 = 180.