Explanation

Formula: Amount = Principal _ (1 + r/100)^n

Given:

Amount = 1.44 _ Principal

n = 2 years

Put values:

1.44 _ P = P _ (1 + r/100)^2

Cancel P from both sides:

(1 + r/100)^2 = 1.44

Take square root both sides:

1 + r/100 = 1.2

r/100 = 1.2 - 1 = 0.2

r = 0.2 * 100 = 20

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Explanation

After a 25% discount, the selling price is 75% of the original price.

Original price = 150 ÷ 0.75 = Rs. 200.

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Explanation

Absolute value represents the distance from zero.

The distance of −2 from 0 is 2.

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Explanation

For objects moving in opposite directions, relative speed = sum of their speeds.

50 + 100 = 150 km/hour.

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Explanation

The statement “Doctors are not illiterate” means all doctors are literate.

Sana is illiterate.

Therefore, Sana cannot be a doctor.

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Explanation

Father’s current age = 72 − 6 = 66 years.

Son’s current age = 66 ÷ 6 = 11 years.

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Explanation

The HCF of 35 and 63 is 7.

Divide both terms by 7: 35 ÷ 7 : 63 ÷ 7 = 5 : 9.

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Explanation

HCF of 20 and 6 = 2.

Divide both by 2: 20 ÷ 2 : 6 ÷ 2 = 10 : 3.

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Explanation

|3| = 3, |−3| = 3, and 2² = 4.

|−3²| = |−9| = 9 → 3 − 3 − 4 − 9 = −13.

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Explanation

A comes before B.

B comes before D, and C also comes before D.

Therefore, D must be the last to reach.

Last verified on 02-09-2026